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Kuhnt AS55X Service Manual

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55X Series
SERVICE MANUAL

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Summary of Contents for Kuhnt AS55X

  • Page 1 55X Series SERVICE MANUAL...

  • Page 3: Table Of Contents

    SERVICE MANUAL AS55X Index of content General functions ..........................7 Fax ............................7 Callback ............................ 7 Callback termination ....................... 7 Short message callback request ....................8 GSM channel groups ....................... 8 VPN ............................9 Internet ............................ 9 GME (GSM Mobility Extender) ....................10 PassThrough ..........................
  • Page 4 LAN ..........................51 4.1.4 Demo ..........................51 4.1.5 Reverse IP access ......................51 4.1.6 Remote access via Telnet channel of AS55X ..............52 Import / Export function ....................... 52 Configuration ..........................53 General ..........................53 5.1.1 Tones and announcements ................... 53 5.1.2...
  • Page 5 SERVICE MANUAL AS55X 5.4.2 Protocol options ......................65 POTS settings ......................... 68 5.5.1 Interface settings ......................68 5.5.2 Fax settings ........................69 5.5.3 CLIR with FAX calls ......................69 ISDN access ..........................70 5.6.1 General .......................... 70 5.6.2 MSN-GSM link list ......................72 5.6.3...
  • Page 6 SERVICE MANUAL AS55X 5.11.2 PassThrough ........................ 113 5.11.3 SimSwitch ........................116 5.11.4 Telnet ........................... 119 5.11.5 SMS server ........................120 5.11.6 DialCommand ......................121 5.11.7 GSM-PBX ........................122 5.11.8 SNMP ........................... 128 5.11.9 PassThrough backup mode ..................129 5.11.10 ProviderSimSwitch ....................... 130 5.12...
  • Page 7 SERVICE MANUAL AS55X 7.11 Restarts ..........................156 7.12 System clock / calendar ....................... 156 7.13 View SimSwitch status ......................156 7.14 View device data ......................... 157 7.15 View extended features ...................... 157 7.16 View test licenses ........................ 157 7.17 Dial command ........................157 7.18...
  • Page 8 SERVICE MANUAL AS55X 8.10 Release 3.14 ........................169 8.10.1 New and improved features ..................169 8.10.2 Problem solution ......................170 8.11 Release 3.15 ........................170 8.11.1 New and improved features ..................170 8.11.2 Problem solution ......................171 8.12 Release 3.16 ........................172 8.12.1...

  • Page 9: General Functions

    The callback termination function is implemented to save fees on the mobile phone site. It is possible to call the AS55X with or without transmitting your caller ID (CLIP / CLIR). The call-setup or the call will be aborted immediately and the AS55X will initiate a callback to the mobile phone.

  • Page 10: Short Message Callback Request

    GSM you can choose between number presentation (CLIP) or number restriction (CLIR). In case of CLIR is active the customer sees a number of the AS55X but could not know who is the subscriber of the calling number. With ‘short message callback request’...

  • Page 11: Vpn

    VPNs. In order to separate VPN user numbers from subscriber number at the PBX, a VPN prefix has to be created for each GSM channel of the AS55X that is part of the VPN. From the sight of the PBX, this GSM-VPN is an independent network with its own prefix.

  • Page 12: Gme (Gsm Mobility Extender)

    GSM network or signalized on both media. Calls which are accepted on mobile phone can be redirected in the PBX. Calls from mobile phone can be handled over the AS55X and so the CLIP of you PBX extension will be transmitted.

  • Page 13: Telnet

    SERVICE MANUAL AS55X With a SimSwitch AS55X it is possible to use up to five SIM cards for each GSM channel. E.g. SIM cards with a special amount of free minutes (SMS) can be used. The AS55x checks if the maximum number of minutes is reached and switches automatically to the next SIM card.

  • Page 14: Snmp

    The AS55X has to be SIP client. It is also possible to use DTMF dialling. In the other direction you can use the AS55X to present your VoIP number. Therefore a call to the AS55X, followed by DTMF dialling is necessary.

  • Page 15: Providersimswitch

    PassThrough backup call is in progress. Please keep in mind, that the call-setup time is longer in this case as the AS55X BRI tries to forward the call to the fixed network first. It checks via timer if all dialled digits did arrive and finally it starts the call via GSM.

  • Page 16: Dtmf Codes (Wll550 Pro)

    SERVICE MANUAL AS55X 1.18 DTMF Codes (WLL550 Pro) In some cases instant access to the setup of the WLL 550 Pro is necessary. For this you can use a simple touchtone phone on the analogue TEL-port (POTS) of the WLL 550 Pro.

  • Page 17: Technical Features

    SERVICE MANUAL AS55X Technical Features 2.1 SimSwitch 551 (PRI/VoIP) - AS551 Master (PRI/VoIP)  Power supply: Built-in power supply Voltage: 90 – 264V AC, 47 – 440 Hz IEC power connector within two 2,5A fuses (medium time lag) Power input: 6 channel (MC55i): ca.
  • Page 18 SERVICE MANUAL AS55X  Maintenance: Service software (http://www.kuhnt.com) Interfaces: local: USB (security: password) remote: LAN, GSM (security: username and password)  Size: 19 inch rack aluminium (AS551) /19 inch rack steel (SimSwitch AS551) 1 rack unit (1U) Size: width: 483mm, height: 45mm, depth: 300mm...

  • Page 19: Simswitch As551/4V Bri - As551/4V Bri

    SERVICE MANUAL AS55X 2.2 SimSwitch AS551/4V BRI - AS551/4V BRI  Power supply: Built-in power supply Voltage: 90 – 264V AC, 47 – 63 Hz IEC power connector within two 2,5A fuses (medium time lag) Power input: 4 channel (MC55i): ca.
  • Page 20 SERVICE MANUAL AS55X  Size: 19 inch rack aluminium (AS551 / 4V BRI) or steel (SimSwitch AS551 / 4V BRI) 1 rack unit (1U) Size: width: 483mm, height: 45mm, depth: 300mm Weight: SimSwitch AS551 Master / 4V BRI: ca. 3,9kg AS551 Master / 4V BRI: ca.

  • Page 21: Simswitch As551/2V Bri - As551/2V Bri

    SERVICE MANUAL AS55X 2.3 SimSwitch AS551/2V BRI - AS551/2V BRI  Power supply: Built-in power supply Voltage: 90 – 264V AC, 47 – 63 Hz IEC power connector within two 2,5A fuses (medium time lag) Power input: AS551 2 channel (TC63i): ca.
  • Page 22 SERVICE MANUAL AS55X  Size: 19 inch rack aluminium 1 rack unit (1U) Size: width: 483mm, height: 45mm, depth: 300mm Weight: SimSwitch AS551 Master / 4V BRI: ca. 3,8kg AS551 Master / 4V BRI: ca. 2,1kg  Environment Operating temperature: 5°C to 40°C...

  • Page 23: Simswitch As551 Slave - As551 Slave

    SERVICE MANUAL AS55X 2.4 SimSwitch AS551 Slave - AS551 Slave  Power supply: Built-in power supply Voltage: 90 – 264V AC, 47 – 440 Hz IEC power connector within two 2,5A fuses (medium time lag) Power input: 8 channel (MC55i): ca.

  • Page 24: Simswitch As550/2V Bri - As550/2V Bri

    SERVICE MANUAL AS55X 2.5 SimSwitch AS550/2V BRI - AS550/2V BRI  Power supply: External power supply Voltage: 7,5V DC / 3A Coaxial power connector Power input: 2 channel (TC63i): ca. 2,5W / ca. 5W (min/max) Minwa MM065P300CGS ca. 3,5W / ca. 6W (min/max) Mascot type 9619 ...
  • Page 25 SERVICE MANUAL AS55X  Size: Desktop aluminium box Size: SimSwitch AS550 / 2V BRI: width: 150mm, height: 80mm, depth: 245mm AS550 / 2V BRI: width: 150mm, height: 38mm, depth: 245mm Weight: SimSwitch AS550 / 2V BRI: ca 1,15kg without power supply AS550 / 2V BRI: ca.

  • Page 26: Simswitch As550/2V (Voip) - As550/2V (Light) (Voip)

    SERVICE MANUAL AS55X 2.6 SimSwitch AS550/2V (VoIP) - AS550/2V (light) (VoIP)  Power supply: External power supply Voltage: 7,5V DC / 3A Coaxial power connector Power input: 2 channel (MS55): ca. 2W / ca. 6W (min/max) Minwa MM065P300CGS ca. 3W / ca. 7,5W (min/max) Mascot type 9619 2 channel (TC63i): ca.
  • Page 27 SERVICE MANUAL AS55X  Size: Desktop aluminium box Size: width: 150mm, height: 38mm, depth: 245mm Weight: ca. 810g without power supply  Environment Operating temperature: 5°C to 40°C Storage temperature: -10°C to 70°C Humidity: 0% to 90% 55Xseries_manual_V3.17 (15-07-22) www.kuhnt.com...

  • Page 28: Wll 550 Pro Rev1 (Wireless Local Loop)

    SERVICE MANUAL AS55X 2.7 WLL 550 Pro Rev1 (wireless local loop)  Power supply: External power supply Voltage: 7,5V to 15V DC 7,5V DC / 3A (enclosed power supply) Coaxial power connector Power input: 2 channel (TC63i / EU3-E): ca. 4,5W / ca. 10W (min/max) Mascot type 9619 ...
  • Page 29 SERVICE MANUAL AS55X  Size: Desktop aluminium box Size: width: 150mm, height: 38mm, depth: 245mm Weight: ca. 810g without power supply  Environment Operating temperature: 5°C to 40°C Storage temperature: -10°C to 70°C Humidity: 0% to 90% 55Xseries_manual_V3.17 (15-07-22) www.kuhnt.com...

  • Page 30: Wll 550 Pro Rev2 (Wireless Local Loop)

    SERVICE MANUAL AS55X 2.8 WLL 550 Pro Rev2 (wireless local loop)  Power supply: External power supply: Voltage WLL550 Pro: 12V to 30V DC > Micro Mate-N-Lok connecting cord included < Power consumption: 2 channel (TC63i / EU3-E): Min. approx. 4,5W / max. ca. 10W (With Mascot type 9619) ...

  • Page 31: As5501 / Easyline (Voip)

    SERVICE MANUAL AS55X 2.9 AS5501 / EasyLine (VoIP)  Power supply: External power supply Voltage: 7,5V DC / 3A Coaxial power connector Power input: 2 channel (MC55i): ca. 2W / ca. 6W (min/max) Minwa MM065P300CGS ca. 3W / ca. 7,5W (min/max) Mascot type 9619 ...

  • Page 32: Exterior View / Connectors

    SERVICE MANUAL AS55X Exterior view / Connectors 3.1 SimSwitch AS 551 Master (PRI/VoIP)  Front  Back 1. LAN connection 10/100 Mbps connector for LAN (for SIP communication and configuration) 2. USB connection USB Type B for local access 3. Remote access (enable/disable) Switch to allow or deny remote access (LAN/GSM) 4.

  • Page 33: Simswitch As 551 / 4V Bri

    SERVICE MANUAL AS55X 3.2 SimSwitch AS 551 / 4V BRI  Front  Back 1. LAN connection 10/100 Mbps connector for LAN (for SIP communication and configuration) 2. ISDN TE (ISDN Slave) RJ 45 connector for clock synchronisation, PassThrough input or ISDN Subscriber 3.

  • Page 34: Simswitch As 551 / 2V Bri

    SERVICE MANUAL AS55X 3.3 SimSwitch AS 551 / 2V BRI  Front  Back 1. LAN connection 10/100 Mbps connector for LAN (for SIP communication and configuration) 2. SIM slot Five slots per channel for 3V Mini-SIM Cards. (Channel 1 is labeled with GSM1; channel 2 is labeled with GSM 2) 3.

  • Page 35: As 551 Master (Pri/Voip)

    SERVICE MANUAL AS55X 3.4 AS 551 Master (PRI/VoIP)  Front  Back 1. LAN connection 10/100 Mbps connector for LAN (for SIP communication and configuration) 2. USB connection USB Type B for local access 3. Remote access (enable/disable) Switch to allow or deny remote access (LAN/GSM) 4.

  • Page 36: As 551 / 4V Bri

    SERVICE MANUAL AS55X 3.5 AS 551 / 4V BRI  Front  Back 1. Reset button To restore the configuration press the reset button first and then plug in the power supply. After you release the button, the device will start with default configuration.

  • Page 37: As 551 / 2V Bri

    SERVICE MANUAL AS55X 3.6 AS 551 / 2V BRI  Front  Back 1. LAN connection 10/100 Mbps connector for LAN (for SIP communication and configuration) 2. Reset button To restore the configuration press the reset button first and then plug in the power supply. After you release the button, the device will start with default configuration.

  • Page 38: Simswitch As 551 Slave

    SERVICE MANUAL AS55X 3.7 SimSwitch AS 551 Slave  Front  Back 1. Power LED 2. Master LED 3. SIM Slot Depending on version; with four or eight slots for 3V Mini-SIM cards cards (first SIM of the channel). The further slots from two to five are hidden under the top cover. To change the SIM cards, remove the two screws on the left and right side, gently push back the cover a few centimetres and lift the cover.

  • Page 39: As 551 Slave

    SERVICE MANUAL AS55X 3.8 AS 551 Slave  Front  Back 1. Power LED 2. Master LED 3. SIM Slot Expansion with up to eight slots for 3V Mini-SIM cards. 4. Channel status LED 5. Antenna connection SMA connector (female) 6.

  • Page 40: Simswitch As 550 2V Bri

    SERVICE MANUAL AS55X 3.9 SimSwitch AS 550 2V BRI  Front • Back 1. LAN connection 10/100 Mbps connector for LAN (for SIP communication and configuration) 2. Reset button To restore the configuration press the reset button first and then plug in the power supply. After you release the button, the device will start with default configuration.

  • Page 41: Simswitch As 550 2V

    SERVICE MANUAL AS55X 3.10 SimSwitch AS 550 2V  Front • Back 1. LAN connection 10/100 Mbps connector for LAN (for SIP communication and configuration) 2. Power LED 3. SIM Slot Five slots per channel for 3V Mini-SIM Cards. (Channel1 is labelled with GSM1; channel2 is labelled with GSM 2) 4.

  • Page 42: As 550 2V Bri

    SERVICE MANUAL AS55X 3.11 AS 550 2V BRI  Front • Back 1. LAN connection 10/100 Mbps connector for LAN (for SIP communication and configuration) 2. Reset button To restore the configuration press the reset button first and then plug in the power supply. After you release the button, the device will start with default configuration.

  • Page 43: As 550 2V (Standard / Light)

    SERVICE MANUAL AS55X 3.12 AS 550 2V (standard / light)  Front • Back 1. LAN connection 10/100 Mbps connector for LAN (for SIP communication and configuration) 2. Power LED 3. SIM Slot Two slots for 3V Mini-SIM Cards. 4. Channel status LED 5.

  • Page 44: Wll 550 Pro Rev1 (Wireless Local Loop)

    SERVICE MANUAL AS55X 3.13 WLL 550 Pro REV1 (wireless local loop)  Front • Back 1. LAN connection 10/100 Mbps connector for LAN 2. Reset button To restore the configuration press the reset button first and then plug in the power supply. After you release the button, the device will start with default configuration.

  • Page 45: Wll 550 Pro Rev2 (Wireless Local Loop)

    SERVICE MANUAL AS55X 3.14 WLL 550 Pro REV2 (wireless local loop) 1. Network connector: LAN 10/100 Mbit/s (For configuration setup and internet access) 2. Power LED / Online status LED 3. SIM card reader with status LED – channel 1 (LTE/UMTS/i-net, phone) 4.

  • Page 46: As 5501 / Easyline

    SERVICE MANUAL AS55X 3.15 AS 5501 / EasyLine  Front • Back 1. LAN connection 10/100 Mbps connector for LAN (for SIP communication and configuration) 2. Power LED LED flashes steady green if the power supply is connected. 3. SIM Slot Two slots for 3V Mini-SIM Cards.

  • Page 47: Led Status

    SERVICE MANUAL AS55X 3.16 LED status  Power LED o LED is steady green if the power supply is connected and the first configuration is done o LED is blinking red if the power supply is connected and no configuration is...
  • Page 48 SERVICE MANUAL AS55X o LED is blinking yellow if ISDN layer 2 is active but there has been no TEI exchange before (only in ISDN point-to-multipoint mode) (e.g. conflictive point- type configuration)  ISDN NT LED o LED is steady green if PassThrough or synchronisation is configured and a BRI...
  • Page 49 SERVICE MANUAL AS55X o LED is blinking red eleven times if there is an error while loading the echo cancelling application respectively while checking “echo cancelling level” o LED is blinking red twelve times if the module will restart by GSM channel restart...

  • Page 50: Service Software

    Please download the latest version (55XWIN32.zip) from the software section. You can use this software for all types of AS55X and on most of the MICROSOFT operating systems: Windows 9x, NT, 2000, XP, VISTA, Windows 7 and Windows 8.
  • Page 51 SERVICE MANUAL AS55X 1. Buttons to save current configuration or to download configuration to AS55X 2. Buttons to load configuration from file, upload configuration from AS55X or to define a default configuration 3. Menu bar o Exit: Button to quit the program...

  • Page 52: Access Type

    “demo mode”. 4.1.1 Some AS55X are configurable via USB. But note that the USB driver is only able to detect and connect to one device. It is not possible to configure more than one device at the same time.

  • Page 53: Lan

    AS55X and you will be requested to set a temporary IP address for this session. Now you can set the IP address of your AS55X so that it is possible to connect to it. But note that this IP address will stay permanently and may concern SIP functions.

  • Page 54: Remote Access Via Telnet Channel Of As55X

    “no”, the whole list will be exported to a text file, which you can save anywhere. This file can only be imported into a AS55X the same type of table. If you press “yes”, the listed GSM/SIP numbers will be copied to the clipboard. Now you can use these numbers in another menu.

  • Page 55: Configuration

    Proceeding ISDN/SIP -> GSM Audible signal for confirming the selection of outgoing calls The AS55X is able to send a confirmation tone or an announcement to the ISDN/SIP subscriber to indicate that the dialling is completed. Useful, because the duration from ending the dialling...
  • Page 56 SERVICE MANUAL AS55X Idle tone GSM -> ISDN/SIP Idle tone for call-setup direction from GSM network This tone or announcement is audible to the calling subscriber from the GSM network to indicate that the called phone is ringing after a DTMF suffix dialling or after a delayed fix subscriber call.
  • Page 57 SERVICE MANUAL AS55X • Continous tone 425 khz • Special dial tone 1 425 khz 440 khz • Special dial tone 2 380 khz • Pulsed dialing tone 425 khz • Intermittent tone I 425 khz • Intermittent tone II 1336 khz •...

  • Page 58: Volume Levels

    SERVICE MANUAL AS55X 5.1.2 Volume levels This feature is not available in all SMS/data only gateways. It is possible to change the volume level for audio and tones separately in each direction. You can adjust the level in 3dB steps. By default all values are set on 0dB level.

  • Page 59: Lan Settings

    AS55X is a client on a managed network with fixed IP addresses. You have to know the IP addresses for the AS55X, the default gateway and the DNS server as well as the subnet mask in your network. This mode should be used, if the AS55X works in SIP Server or SIP peer mode.

  • Page 60: Advanced Network Configuration

    Advanced network configuration  Remote STUN server name At this point you can configure an external STUN server. The AS55X must be set into client mode with or without DHCP. Also the IP address and default gateway must be entered in “LAN interface menu“, otherwise the menu is greyed-out.
  • Page 61 On one hand 10 Mbps is enough bandwidth because in worst case with maximum number of active calls via AS55X there is a maximum LAN load of about 3 Mbps and there are less lost packets via LAN, if lower speed between a LAN-switch and an endpoint (in this case AS55X) is used.

  • Page 62: Isdn Pri Settings

    In this configuration, all units are working synchronously. If the PBX does not allow working as master at this interface and the AS55X must be clock master. The PBX will get two clocks, one from the wired network and one from the AS55X.

  • Page 63: Main Interface Protocol

    DSS1  Protocol option supervise connection: If an ISDN call is in active mode (connected), the AS55X can actively supervise the connection via ISDN STATUS requests every minute. This is recommended in all cases. If your provider or your PBX does not support this, the function must be disabled or the connection will be aborted exactly after one minute.
  • Page 64 This choice will produce costs during the call-setup phase  Protocol option reject If a SETUP from ISDN to the AS55X must be rejected (e.g. no GSM channel available), this can be done in two ways. The normal way is to reject the SETUP with RELEASE COMPLETE. But some PBXs misinterpret this as error.

  • Page 65: Synchron Interface (Isdn Aux)

    To synchronize the AS55X main interfaces clock to an existing PRI clock, connect the ISDN AUX interface to a free PRI interface of your PBX. The AS55X has to be exclusive participant (a single terminal) on this ISDN Bus. The AS55X gets its clock rate from the PBX.

  • Page 66: Isdn Bri Settings

    This option is greyed-out if the AS55X is working in PassThrough mode.  Point-type (line interface type) After you have chosen if the AS55X is ISDN master or ISDN slave, you have to choose if the BRI interface has to operate with a point-to-point or point-to- multipoint connection.

  • Page 67: Protocol Options

    If layer 1 is chosen, the AS55X will only force the interface clocking. In case of layer 1 and 2, address (TEI) management in point-to-multipoint modes is done as soon as possible and the data link layer will be held active.
  • Page 68 SERVICE MANUAL AS55X  Protocol option supervise connection: If an ISDN call is in active mode (connected), the AS55X can actively supervise the connection via ISDN STATUS requests every minute. This is recommended in all cases. If your provider or your PBX does not support this, the function must be disabled or the connection will be aborted exactly after one minute.
  • Page 69 This choice will produce costs during the call-setup phase  Protocol option reject If a SETUP from ISDN to the AS55X must be rejected (e.g. no GSM channel available), this can be done in two ways. The normal way is to reject the SETUP with RELEASE COMPLETE. But some PBXs misinterpret this as error.

  • Page 70: Pots Settings

     Timeout for autostart / Amount of digits for autostart in international order At POTS interfaces dialling can be made only digit by digit but a GSM call setup can be made en bloc only. Therefore the AS55X must collect all digits until the dialled number is complete.

  • Page 71: Fax Settings

    SERVICE MANUAL AS55X 5.5.2 Fax settings This fax gateway is working in a buffering mode for optimal performance via the GSM networks that means for highest probability of transmitting a fax document successfully But in this mode, the sender of a fax does not get an acknowledge, if the fax document really reaches the receiver.

  • Page 72: Isdn Access

     Amount of dialled digits to be ignored In some cases a number is assigned to the tie-line or cross connection the AS55X is connected to and this number is sent as a prefix to the dialled digits. In such cases, it is necessary to ignore the digits of this prefix.
  • Page 73 SERVICE MANUAL AS55X  Change type of dialling number to... / Amount of CLIP digits from ISDN to be ignored / Change type of CLIP digits from ISDN / Type of CLIP to ISDN In ISDN domain, every dialled or dialling number additionally gets a type of number.

  • Page 74: Msn-Gsm Link List

    GSM. Therefore you can link a GSM number to each ISDN MSN. The Length of the list is limited to 100 entries. If the AS55X reach one of the linked MSNs a call to the linked GSM number will be initiated immediately.

  • Page 75: Causes

     ...the call-setup should be rejected in case of presence of the CLIP from ISDN If the call to GSM shall be blocked by the AS55X in the case of presence of the CLIP from ISDN, the desired abort cause must be entered here.
  • Page 76 Some GSM networks do not terminate the call immediately if the called phone is busy, they only switch a busy tone to the calling phone. If the AS55X should detect this busy tone and terminate the call-setup immediately, the desired ISDN cause must be typed in here.
  • Page 77 SERVICE MANUAL AS55X  List of ISDN causes Cause 1 Unallocated (unassigned) number Cause 2 No route to specified transit network Cause 3 No route to destination Cause 6 Channel unacceptable Cause 7 Call awarded and being delivered in an established channel...

  • Page 78: Sip Access

    SERVICE MANUAL AS55X 5.7 SIP access Notice: If you use the AS55X in SIP mode, the ISDN interface will be deactivated. SIP access is not available in all SMS/data only devices and ISDN BRI devices. 5.7.1 General  SIP operation mode o Off No SIP abilities available, AS 55X with PRI interface operates in ISDN mode.
  • Page 79 SERVICE MANUAL AS55X Generally the AS55X is connected (via LAN) to a PBX. In this case the SIP “peer“ mode is the best choice. The AS55X is directly linked to the PBX. It only accepts calls from peer IP address and it routes all call-setups from GSM to the peer IP address.
  • Page 80 SERVICE MANUAL AS55X If you use the callback function of the AS55X, an adjustment of the CLIP might be necessary. When you need some additional digits for a correct routing, you can fill in up to 21 digits in front of the saved number.

  • Page 81: Extended (Expert Mode)

    IP connection you can use this supervise function. If a SIP call is in active mode, the AS55X can actively supervise the connection via SIP reINVITE requests or SIP INFO messages. So every 60 seconds a message will be sent by the AS55X and the opposition will answer.
  • Page 82 SERVICE MANUAL AS55X This is recommended in all cases. If it does not work, try change between SIP INFO and SIP reINVITE. If both methods are not supported by the PBX, you have to switch off this supervision. Default value: …...
  • Page 83 In cases of missing early media or in cases of one way audio it is possible to request or suppress this sequence unconditionally. If the AS55X is working with the value “never” there are no PRACK requests at any time. If you use “always” every SESSION PROGRESS requests a PRACK. With the setting “if supported”...
  • Page 84 Therefore you have to set bit 52 in special settings (see 0). By default, in SIP peer mode the AS55X only accepts SIP calls from the connected peers. If you want to receive numbers from other clients you can uncheck this box.

  • Page 85: Names And Passwords

    SIP protocol. If you define no name, the IP address is set as part of the SIP-URI. If you use the AS55X as SIP client, you are part of the SIP domain of your provider. Therefore it´s recommended to fill in the name of the remote host.
  • Page 86 5060  Peer IP address / 2nd peer IP address These IP addresses have two functions. On the one hand the AS55X sends call setups only to the PBXs on these IP addresses. On the other hand call setups to GSM are accepted only from these IP addresses.

  • Page 87: Authorized User List

    If this list is completely empty, there is no restriction and all subscriber can use the AS55X for outgoing calls to GSM. If an entry consists of a username without password, no authentication is necessary for this user. If a password is defined, the AS55X generates an authentication request to the user.
  • Page 88 SERVICE MANUAL AS55X If the call shall be blocked by the AS55X in the case of presence of the CLIP from SIP, the desired abort reason must be entered here. Default value: not reported  ... the requested GSM channel is busy or not registered at the network or the signal...
  • Page 89 SERVICE MANUAL AS55X AS55X is wanted to detect this busy tone and terminate the call immediately, the wanted SIP abort reason must be typed in here. Default value: not reported 55Xseries_manual_V3.17 (15-07-22) www.kuhnt.com...
  • Page 90 SERVICE MANUAL AS55X  List of SIP responses Response 400 Bad request Response 401 Unauthorized Response 402 Payment required Response 403 Forbidden Response 404 Not found Response 405 Method not allowed Response 406 Not acceptable Response 407 Proxy authentication required...

  • Page 91: Dtmf Processing

    SERVICE MANUAL AS55X 5.7.6 DTMF processing  Convert telephone-event from LAN (RFC2833/4733) to DTMF tones to GSM During an active call, telephone events according to RFC2833/4733 from the remote subscriber will be converted to DTMF tones that are sent to GSM e.g. for controlling mailboxes.

  • Page 92: Codecs

    If the PBX only offers not supported codecs, the gateway will answer with SIP response 415 (UNSUPPORTED MEDIA TYP) and no call will be initiated. For incoming calls the AS55X will choose the first applicable codec without checking the priority.

  • Page 93: Wired Access

    SERVICE MANUAL AS55X 5.8 Wired access “Wired Access” is not available in all SMS/data only gateways. 5.8.1 Country specific settings  Country specific setting for... Here you can choose one of some predefined areas. Then the following fields with national prefix, international prefix and area code will be filled automatically.

  • Page 94: Global Call-Setup

    SERVICE MANUAL AS55X 5.8.2 Global call-setup For more details about callback mode see 1.1. In the following you can draw some distinctions for callback mode like saving duration or about the types of saved calls. For saving the calls in the call setup list and for a possible recall both sides have to display their CLIP.
  • Page 95 If “no call-setup“ is selected, every call-setup attempt to an unspecified number will be rejected by the AS55X. If “Next ready GSM channel“ is selected, every call-setup attempt to an unspecified number will be routed via the next channel, that is registered, that has sufficient signal quality and is not in use.

  • Page 96: Individual Call-Setup

    This numbers are also used for call interception in PassThrough mode (see 5.11.2).  (Beginning of) PBX number To exclude single subscriber numbers from the routing via the AS55X or to define a specific behaviour depending on the calling party number you can add a PBX subscriber number to this list.
  • Page 97 AS55X. If “Next ready GSM channel“ is selected, every call-setup attempt to an unspecified number will be routed via the next channel, that is registered, that has sufficient signal quality and is not in use.

  • Page 98: Short Pbx Domain Number List

    5.8.4 Short PBX Domain number list By default, the AS55X assumes a wired number to be to be an extension number of the PBX if the calling number is no national and no international number. If the PBX also sends calling numbers in national or international order, there can be made exceptions with this list.

  • Page 99: Short Message Callback Request

    SERVICE MANUAL AS55X 5.8.5 Short message callback request Short message callback request is not available for the AS5501 / EasyLine. For more details about “short message callback request” see 1.4.  Message Here the short message text can be entered. The text is limited to 160 characters.
  • Page 100 SERVICE MANUAL AS55X  Send message automatically if call is unsuccessful If this box is checked, the message will be sent automatically if the caller hangs up while the destination is ringing, if the destination is not reachable, if it is busy or has rejected the call.

  • Page 101: Gsm Settings

    Be default the amount is set of the maximum of available channels of your single devise. If you want to use an AS551 Slave or an AS55X with a smaller amount of channels you have to decrease or increase this value, because the AS55X do not detect the installed modules automatically.
  • Page 102 To prevent this case, you can restart each GSM module. Here you can select the global setting referring to the restart mode of the GSM channels. You can choose “without GSM connection”. Then the AS55X will restart www.kuhnt.com 55Xseries_manual_V3.19 (15-07-22)

  • Page 103: Gsm Channels

    SERVICE MANUAL AS55X after the last call or call setup. If you choose “unconditional” the AS55X will restart definitively after the chosen period. Default value: Without GSM connection Notice: A restart will never be triggered while a GSM connection or a call- setup is in progress.
  • Page 104 Notice: If the restart mode or the restart timer in the general window is switched off, the AS55X does not restart the timer if you choose “yes”.  Least signal quality To avoid poor audio quality or instable connections caused by a bad GSM signal level a threshold for a minimum GSM signal quality can be set.

  • Page 105: Gsm Groups

    5.9.3 GSM groups The AS55X has in the largest expansion stage up to 30 channels. The outgoing routing can become very complicated. Therefore multiple channels (e.g. the same provider) can be treated equally within groups. You can create up to 50 groups and rename them according to your requirements.

  • Page 106: Gsm Access

    Reject call for callback after timeout  Call termination / acceptation timeout After this time the AS55X will reject the incoming call or within this time the incoming call has to be rejected manually by the call initiator. If you choose 0 seconds, the call will be rejected immediately.

  • Page 107: By Gsm Channel

    SERVICE MANUAL AS55X After the call from a mobile phone is rejected for a callback or after the mobile phone has aborted his call in order to receive a callback, the AS55X will wait this time before starting the action.
  • Page 108 During this time delay, you have the chance to call someone else by using the DTMF suffix dialling. If the AS55x detects no DTMF tones, the fixed subscriber is called after the chosen period.
  • Page 109 SERVICE MANUAL AS55X Notice: Entries of the access list by GSM numbers have priority over the GSM channel dependent setting.. This feature is not available for the AS550 light and AS5501 / EasyLine.  Callback via DTMF Code According to the “callback via clip” you have also the chance to create a callback by using CLIR.

  • Page 110: By Gsm Number

    SERVICE MANUAL AS55X is allowed in the access list by GSM channel and selectively prevented in the access list by number. An entry in the access list by GSM number always has higher priority than an entry in the access list by GSM channel.
  • Page 111 This subscriber is called directly without any time delay and without any costs. If you use the subscriber delay, the call will be accepted by the AS55X and you have the option to call another PBX extension during this time delay by using DTMF suffix dialling.
  • Page 112 SERVICE MANUAL AS55X  Callback via CLIP If this feature is activated, the call from the GSM subscriber will be treated according to the callback settings in window “GSM access” / “General”. The calling mobile phone must have activated the display of its own number (CLIP). The callback code is not necessary for this feature! For more details about callback termination mode see 1.3.

  • Page 113: Internet

    SERVICE MANUAL AS55X 5.10.4 Internet Internet is only available for WLL 550 Pro. Here you can configure necessary features for the internet access. This access is activated if the "Go Online" Box is marked or if APN details are inserted. The internet connection is a full time connection.

  • Page 114: Extended Features

    GME function by entering the asterisk key “ * ”. If you enable the GME function, no more “ * ” RTP events will be transmitted to the AS55X.  GME hold tone The PBX subscriber will hear this tone or announcement, if the GSM subscriber is calling another PBX subscriber or has switched to the other PBX subscriber.

  • Page 115: Passthrough

    AS5501 / EasyLine. 5.11.2.1 General If you want to use you your AS55X in PassThrough mode, you have to connect the AS55X between wired network and your PBX. Therefore the connection from wired network has to plug in ISDN main connector and the connection to PBX has to plug in-to ISDN aux.
  • Page 116 In interception mode all dialled numbers to wired network will be checked by the AS55X. If there is a match with the “individual call-setup” list from “wired access” (see 5.8.3) and a designated GSM channel is available, the dialled number will be routed directly to wireless network.
  • Page 117 Dialling tone from wired network  Idle tone GSM -> wired network This idle tone will be generated by the AS55X, when the called phone is ringing. If the wired network generates a tone and if it shall be used, choose “Idle tone from wired network”.

  • Page 118: Simswitch

    SimSwitch is not available for the AS550 light and AS5501 / EasyLine.  Operation mode If you use an AS55X with SIM switch, you can choose for every channel up to six different operation modes. These six modes are three voice and three SMS modes.
  • Page 119 If you choose this configuration, all SIMs have the same tariff with the same amount of free inclusive SMS. The AS55X logs in the SIM cards one by one until all inclusive messages are used. After all inclusive messages are used up, no further Telnet sessions can be made until a reset of the message counters.
  • Page 120 At this day of a month, all minute counters will be set to zero. Please pay attention to the settings of the AS55X internal clock! The minute counters will count the connected minutes only, if the connection setup direction is from the www.kuhnt.com...

  • Page 121: Telnet

    You can use up to two Telnet channels in the AS550 and up to six channels in the AS551 Master unit. The AS551 Slave units are not capable for Telnet channels. If you use AS55X SMS server mode (see 5.11.5) you cannot use Telnet on this channel at the same time. All not useable channels are marked red.

  • Page 122: Sms Server

    SMS server is not available for the AS550 light and AS5501 / EasyLine. You can use every GSM channel for SMS server in the AS55X. It is also possible to use all AS551 Slave channel, so that up to 30 channels are available for SMS server.

  • Page 123: Dialcommand

    The extended dial command feature is available for VoIP, ISDN BRI and PRI devices of the AS55X. If the AS55X BRI or PRI is working in PassThrough mode and if a 'Code number for dialling from GSM to wired network' is specified, this one can precede the dialled number to ISDN in order to select the direction of the call.

  • Page 124: Gsm-Pbx

    With this function you can achieve a direct link between a VOIP number and a GSM phone. You can register the AS55X directly with a VOIP provider, therefore the AS55X has to be SIP Client (see 5.7.1). You only need a broadband internet connection. If a call is established to your VOIP number, the associated phone will be called immediately or after a DTMF suffix dialling.
  • Page 125 If you had entered there the local hostname before, it will be filled in here. If this field is empty, the IP address of the AS55X is insert instead and the entry “Registrar IP address” or “Registrar hostname” in “SIP access” is mandatory.
  • Page 126 On the one hand your mobile Phone is directly connected to the SIP number. On the other hand you can call the AS55X via GSM and dial a number on fixed network via DTMF suffix dialling (or via DTMF speed dialling). Therefore the linked SIP number will be used for the outgoing call (especially the outgoing CLIP).
  • Page 127 For quick and easy dialling from SIP you can save up to 100 phone numbers in your AS55X which you can dial by a DTMF shortcut. For these abbreviations you can use all twelve keys on your phone, including hash “#” and the asterisk “*“.
  • Page 128 For quick and easy dialling from GSM you can save up to 100 numbers in your AS55X which you can dial by a DTMF shortcut. For these abbreviations you can use all twelve keys on your phone, including hash “#” and “*“. The length of this DTMF string is limited to 21 characters.
  • Page 129 SERVICE MANUAL AS55X and the digits “ 0...9 ”. After one of these two events, the call setup will start immediately. Default value: 4 seconds / “ # “  Check speed dialling list with every digit from SIP Normally with every received digit, the dialled number will be searched in the regarding speed dialling list.

  • Page 130: Snmp

    SNMP is not available for the AS550 light and AS5501 / EasyLine. You can configure SNMP for two different SNMP managers.  SNMP Port This UDP port is used by the SNMP agent of the AS55X for receiving and sending of SNMP messages. Default value: ...

  • Page 131: Passthrough Backup Mode

    This IP address is also used to send traps. Default value: not reported  Trap port This UDP port is used by the SNMP agent of the AS55X so address SNMP messages. Default value: not reported ...

  • Page 132: Providersimswitch

    SERVICE MANUAL AS55X 5.11.10 ProviderSimSwitch Provider SimSwitch is only available for AS55x and WLL 550 Pro with SimSwitch hardware. For more details about the ProviderSimSwitch see 1.17 To configure the “ProviderSimSwitch” activate the SIM slot of SIM 1 to 5 by setting it to “Yes”.

  • Page 133: Special Settings

    Default value: 0.10 sec.  Waiting time for first digit from ISDN The AS55X waits this time for the first digit of ISDN suffix dialling. After this timer has expired, the call-setup attempt from ISDN domain will be aborted. Default value: 15 sec.
  • Page 134  Time limit of call to fix subscriber If a call to a fix subscriber is in progress, the AS55X is waiting this time for an answer of the called user. After this timer has expired, the GSM caller can select another ISDN subscriber by DTMF dialling.
  • Page 135 10.00 sec.  SIP registration repetition In SIP client mode, the AS55X must register at its server for a period of time and then the registration must be repeated. If you choose a short period, the LAN load is high. A too long period may cause problems when working via a DSL modem if you are getting a new public IP address.

  • Page 136: Unnamed Bits

    SERVICE MANUAL AS55X 5.12.2 Unnamed bits  Unnamed bit 3, reset GSM channel If this bit is set, the GSM channel will be restarted when an outgoing call is aborted within one second or with error code 'call barred'.  Unnamed bit 5, fixed link of ISDN B-channel to GSM channel If this bit is set, in both directection from ISDN to GSM and from GSM to ISDN the ISDN B-channel are directly linked to the correspondent GSM channel.
  • Page 137 (SDP), the AS55X redirects the sending of the RTP stream to the source of the received one. This setting can be necessary, if a NAT router is placed between AS55X and PBX (or SIP provider).
  • Page 138 There is information in a SIP request, where to send the response. In some cases, especially in contact with NAT, this value is not set correctly. If this unnamed bit is set, the AS55X does always send the response to that IP address and port, it receives the request from.
  • Page 139 In SIP client mode normally call setups are only accepted if they correspond to that entity, the AS55X is registered at. A random number in the registration contact is used to recognize the entity, but some providers do not handle this contact properly.
  • Page 140 Some PBXs do not want to find SDP in SIP RINGING. With this bit, it will be suppressed.  Unnamed bit 70, allow SIP remote logical address header redefinition In single cases, PBXs change the local tag in the To-Header without permission. With setting of this bit, the AS55X will tolerate it. www.kuhnt.com 55Xseries_manual_V3.19 (15-07-22)

  • Page 141: Unnamed Bytes

    SERVICE MANUAL AS55X  Unnamed bit 74, suppress CLIP with FAX calls Normally the GSM number for FAX calls differs from that one for voice calls. But for outgoing FAX calls, the voice number is displayed to the recipient. Hence, a FAX back to the displayed number will fail.
  • Page 142 SERVICE MANUAL AS55X 8: Convert DTMF from GSM to telephone event to SIP Code the byte as sum of the single modes. The telephone event (RFC2833/4733) conversion modes are also settable with DTMF processing in SIP access configuration. Default value: ...
  • Page 143 AS55X normally offers 123. But some PBXs need a special payload type, offered by the AS55X, it can be set here. This value has no affect to call setup directions from the PBX to GSM. The SIP telephone event is needed for DTMF via SIP (RFC2833/4733).
  • Page 144 SERVICE MANUAL AS55X The SIP phone context is an additional information element of the SIP FROM or TO headers in order to include number prefixes. With the value 1 of this byte, phone context is used, if the phone number is not in national or international order.
  • Page 145 SERVICE MANUAL AS55X If a FAX connection failed, after this time in seconds, the WLL is trying again. Default value: 0, same as 10  Unnamed byte 113, maximum call trials to local FAX The maximal number of call trials to the local FAX device, that is connected to the analogue interface of the WLL.

  • Page 146: Unnamed Words

    5.12.4 Unnamed words  Unnamed word 15, SIP local RTP port base By default, the AS55X uses RTP port numbers beginning from 30000. If there should be a conflict e.g. due to port forwarding in the router, this port number base can be changed.
  • Page 147 SERVICE MANUAL AS55X  Unnamed word 19, SIP REGISTER repetition period If the AS55X is in SIP client mode, after the time value set here, the registration process at its server will be repeated. Set this value in seconds. Default value: 300 (5 minutes) ...

  • Page 148: Unnamed Long Words

    5.12.5 Unnamed long words  Unnamed long word 10, SIP CLIP source header list. The CLIP from the PBX, used by AS55X for callback issues, can be present in different SIP headers. And the effective CLIP entry of these headers can differ.

  • Page 149: Test Licences

    After this test licence has been started, it can be halted in order to start it again later on. With the test licence, the AS55X can be configured like with regular licenses. After the license duration has expired, the device stops normal processing and only maintenance is possible.

  • Page 150: Installation

    (or no) PIN for all SIMs in one channel. To save the PIN in AS55X, enter it, select the channel and press “Apply”. The PIN will be saved in the device and NOT in the configuration data. If you use this configuration data in a second device or backup it, the PINs will not be saved.

  • Page 151: Set Name Of Device

    6.4 Set name of device For better determination and for ease of operation, you can assign a name for each AS55X device. This will appear in the search for a device in the LAN or at the services menu in the device data The name of the device is not part of the configuration and will not be saved in configuration data / file.

  • Page 152: Enter Upgrade Code

    SERVICE MANUAL AS55X 6.7 Enter upgrade code Your AS55X could be equipped with some additional features. To check which features are activated, look at services menu (see 7.15). To test these features you have the option to activate a 28 days test license (see 5.13).

  • Page 153: Services

    “Pause” button again. Then the further trace will run normal. A backward trace will not trace in real time. The AS55X is equipped with a first-in first-out memory. If the memory is full, the oldest data will be overwritten. So you have the opportunity to get last trace data from the past events.

  • Page 154: View Gsm Channel States

    The IMSI number of your SIM card is listed next. In the first five digits indicate your home network (MCC and MNC). The next eleven digits of the IMSI are your MSIN. The flash error code indicates the same errors as the LED outside the AS55X. These errors are described in the following table.

  • Page 155: Control Gsm Channel

    PBX forwards the source calling number. If the AS55X detects a special type of number (e.g. international, national), it is listed in the field “source calling number type”. All directly routed calls are listed in the column “Source called number”.

  • Page 156: View Call Setup List

    This feature is not available for the AS550 light and AS5501 / EasyLine. 7.5 View call setup list This list is to monitor the callback function of the AS55X. In the menu “global call-setup” you can choose the call setup type. Thereafter every call or every unanswered call is shown is this list.

  • Page 157: View Sip Status

    (see 5.7.4). 7.10 View statistics In the statistic menu, you can see all data which are captured by the AS55X. First you can see the runtime of your system. This is the power-on time and not the time since the first start.

  • Page 158: Restarts

    SERVICE MANUAL AS55X 7.11 Restarts Here you have the option to restart parts of the AS55X or the complete device. First you have the option to restart all GSM channel. If you use GSM data exchange, you would cut your own connection. For this reason it´s also possible to restart only one of the GSM channel.

  • Page 159: View Device Data

    This shows the state of your test license. You can see if the test license is running or stopped. The remaining time persists after a firmware update and stops if the AS55X is powered off. For more details see 5.13.

  • Page 160: Short Message Control

    SMS applications and includes all important messages which can be sent by the application to the AS55X. First you have to enter server IP address and port. If you now press “Connect to server” a new telnet session to AS55X will be established. If you now want to test sending or receiving a short messages you can use the templates button on the right.

  • Page 161: Release Notes

    Release Notes The Firmware 3.00 is the junction of ISDN release 1.11 and SIP release 2.29. The switching between ISDN and SIP can be done with the AS55X Service Software. This firmware can be used for all supported AS55X hardware versions.

  • Page 162: Problem Solution

    SERVICE MANUAL AS55X Every AS55X gets a test licence for maximum device features for a duration of four weeks. With updating to firmware 3.01, the test licence is automatically granted. Please read further information in the help context of the configuration.

  • Page 163: Problem Solution

    SERVICE MANUAL AS55X  GSM PBX implemented The GSM PBX provides facilities for SIP DID registration or multiplexed single user registrations at a SIP provider. SIP numbers can directly be linked to GSM numbers or DTMF dialling is possible with or without speed dialling lists in both directions.

  • Page 164: Release 3.04

    Normally a SIP client can send only his own user number or username as CLIP to the provider. But in special cases the AS55X is wanted to include the GSM CLIP as calling party number into the INVITEs to the provider. This facility is implemented now.

  • Page 165: Release 3.05

     Telnet Enhancements Some virtual Com Port drivers really want to control a remote hardware via Telnet protocol. The AS55X responds to such control codes since this release. Additionally a raw TCP mode is implemented that does not expect and not use any Telnet control characters.

  • Page 166: New And Improved Features

    90 in 10ms steps from 0 (value 0) to 150ms (value 15).  DHCP If the AS55X works in DHCP client mode, sometimes there was a lack in complete registering the received IP address at the server. This problem is solved.  SIP User-Agent header Since firmware version 3.03 the SIP User-Agent header is enhanced with device...

  • Page 167: Release 3.11

     Short message server A short message server is implemented for easy sending and receiving short messages via the AS55X through network applications. Such application named “SMS Center” is offered. Interested parties, who want to write SMS applications their selves, are requested to contact the distributor for API information about the message server.

  • Page 168: Release 3.12

    A detection is implemented, if a number, exchanged with the PBX, is a number of the PBX domain (extension number) or not. By default, the AS55X assumes a wired number to be an extension number of the PBX if the calling number is no national and no international number. If the PBX also sends calling numbers in national or international order, there can be made exceptions with the PBX domain number list.

  • Page 169: Problem Solution

    SERVICE MANUAL AS55X For AS55X WLL there is a new DTMF code that restarts one specific or all GSM channels. This makes the GSM channel register preferably onto the home network of the SIM. This code is '#734#' for all channels, '#7341#' for the first and '#7342#' for the second channel.

  • Page 170: Release 3.13

     Instability after reception of a flood of broadcast messages After reception of a great mass of broadcast messages (more than 200) without any gap, the AS55X could get instable. This had affect to all LAN functions, VoIP audio stream was chopped in that case. This problem is fixed with firmware 3.12.

  • Page 171: Problem Solution

     Authentication to SIP BYE Some PBXes need an additional authentication for the termination of a call. The AS55X can handle it now.  DNS and DHCP with WLL In some cases DNS requests would not be forwarded to internet properly if no explicit DNS server IP address has been configured in WLL550 (e.g.

  • Page 172: Problem Solution

     Trace forward during LAN service session If all received and sent LAN frames shall be traced, the frames for the service channel between computer and AS55X are excluded. Hence, trace forward in this case is possible now.  New module release of TC63i The TC63i release 02.004 is supported now.

  • Page 173: Problem Solution

    SERVICE MANUAL AS55X  Reverse IP remote access Especially for the AS550 WLL, but in few cases for all other AS55X as well, there are Situations that prohibit from access via the existing remote access channels. Hence, a new channel is implemented so called 'Reverse IP access'.

  • Page 174: Release 3.16

    SERVICE MANUAL AS55X  Charge signal only for outgoing calls The charge signal for AS55X PRI and BRI was generated for outgoing calls to and incoming calls from GSM. This is corrected and form now on only present for outgoing calls to GSM.

  • Page 175: Problem Solution

    SERVICE MANUAL AS55X  CLIR with FAX calls Outgoing FAX calls present the voice number instead of the FAX number of the SIM. This can result into confusion by the recipient, which number should be used for a reply. If unnamed bit 74 is set, the presentation of the number will be restricted, even if it is requested for voice calls.

  • Page 176: Release 3.17

    (Accepted) after it received and accepted a message request. This behaviour can be changed with the unknown byte 127. With value 1, the AS55X will first send a provisional response and a final response, when the short message sending is completed. With value 2, the provisional response will be omitted.

  • Page 177: Problem Solution

    GSM is implemented. With the configuration, a remote IP address can be linked to a dedicated GSM channel of the AS55X or a login with a set of username and password can be used to address a GSM channel.

  • Page 179: Personal Notes

    Personal notes www.kuhnt.com...

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