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Sigrand SG-16G User Manual

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SIGRAND
SHDSL modem
Sigrand SG-16G
User's Guide
v. 2.4
Novosibirsk
2006
1

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Summary of Contents for Sigrand SG-16G

  • Page 1 SIGRAND SHDSL modem Sigrand SG-16G User's Guide v. 2.4 Novosibirsk 2006...
  • Page 2 © 2005, 2006 Sigrand LLC All trademarks and registered trademarks mentioned hereinafter are the property of their respective owners.

  • Page 3: Table Of Contents

    Contents Contents page How to use this Guide Modem description DSL interface specifications 1.1.1 Maximum reach performance E1 interface specifications RS-232C interface specifications Power supply unit Miscellaneous data Shipment contents Environmental specifications Appearance, controls, indicators and connectors 1.8.1 Front panel and indicators 1.8.2 Rear panel and connectors Modem setup directions Connecting modem to a line...
  • Page 4 The help dsl command The dsl command 3.3.1 “Master”/”slave” mode selection The dsl master and dsl slave commands 3.3.2 Setting DSL rate The dsl rate command 3.3.2.1 Automatic rate selection The dsl rate auto command 3.3.3 Line coding selection The dsl code command 3.3.4 Link statistics The dsl stat command The dsl stat reset command...

  • Page 5: How To Use This Guide

    How to use this Guide To ease using this Guide the following notational conventions are provided here ( icons as well as relevant fonts): Icons Icon Meaning Explanation The text marked by this icon contains  Pay attention! information making easy setup and maintenance of equipment The text marked by this icon contains important information explaining...
  • Page 6 Before starting installation of the modem we recommend you  to look for a updated version of this User's Guide as well as the firmware and the drivers available at our site www.sigrand.com...

  • Page 7: Modem Description

    1. Modem description The Sigrand SG-16G modem is a SНDSL-modem. It features an E1 system interface (ITU-T G.703/G.704, 2048 kbps) and is intended to be used as a line termination unit of TDM-based communication equipment. The modem allows to make connections between devices equipped with E1 interfaces such as telco equipment, routers and access servers.

  • Page 8: Dsl Interface Specifications

    16G modem is shown on Table 2. The Bit Error Rate (BER) at the maximum reach is equal to or less than 10 . The specified reach is proved by testing at the Sigrand lab reference line. Full version of the rate table is available at...

  • Page 9: E1 Interface Specifications

    An actual reach may vary against the shown data due to variations of cable performance. Table 2 TPP50-0.4 TPP50-0.5 Data rate Rating cable cable Line coding (kbps) (26 AWG) (24 AWG) Length (km/ft) 3.8/12400 5.6/18300 2048 TCPAM16 1064 R (Ω)

  • Page 10: Rs-232C Interface Specifications

    • 165/6.5 depth, mm/in. Weight, g/lb 450/1 Weight with PSU, g/lb 1050/2.32 Power consumption, W 1.6 Shipment contents Sigrand SG-16G modem 1 pc. Power supply unit 1 pc. Guide 1 pc. Cable with converter RJ-45-DB-9 1 pc. Package 1 pc.

  • Page 11: Environmental Specifications

    1.8 Appearance, controls, indicators and connectors The Sigrand SG-16G modem can be connected to any equipment having E1 interface such as telco equipment, routers and access servers. The modem is manageable by switches placed on the rear panel as well as by console management port (ch.

  • Page 12: Rear Panel And Connectors

    No signal from Е1 equipment Frame synchronization detected or SYNC Unframed mode Frame synchronization not detected Test mode TEST Operation mode 1.8.2 Rear panel and connectors Layout of connectors and switches on the rear panel of the Sigrand SG-16G modem Figure 2...
  • Page 13 Purpose of connectors and switches of the Sigrand SG-16G modem Table 4 Power supply unit plug 9-12V DC RS-232C console port for modem management RS232 DSL line connector Terminal to connect to protective ground PGND Dial to select fixed rate for DSL channel...
  • Page 14 The “SET1” DIP switch sets “Master/Slave” mode, the “SET2” switch defines a method of the DSL channel rate negotiation and the “SET4” switch sets a mode of modem management. Purpose of the switches are shown on Table Table 5 Switch Purpose Position Meaning...

  • Page 15: Modem Setup Directions

    After you verify that the line comply with the aforementioned requirements - • Fix the supplied RJ-45 plug on the cable in accordance with figure 5. The Sigrand SG-16G modem uses only one pair of pins, namely 4 and 5. Other pins are not assigned. •...

  • Page 16: Choosing Modem Management Method

    2.2 Choosing modem management method There are two ways to manage the modem: • by the DIP-switches placed on the rear panel of the modem (see fig.4); • by a terminal program via the RS-232C console port. Both modes have certain advantages over each other so a user is free to choose either setup mode according to actual requirements for modem operation.

  • Page 17: Rate Selection Guidelines

    2.4.1 Rate selection guidelines Before setting the data rate you should have known the performance of the line the modems are intended for. If the line performance is unavailable, apply the following technique to select the proper data rate: • Measure resistance of the line.

  • Page 18: Configuring Е1 Interface

    6, figure 5). Other pins are not assigned. It is not necessary to recognize polarity of the connection. Table 6 Е1 circuit Receive + (Rx Tip) Receive – (Rx Ring) Transmit + (Tx Tip) Transmit – (Tx Ring) 2.5.2 Configuring Е1 interface In the DIP switches setup mode (SET4 is OFF) the E1 port always has the following fixed settings: •...

  • Page 19: Modem Management Via Console Port

    Baud rate (Bits per second) should be set to 9600 or 57600 in accordance with SET3 switch setting. Power on or reboot the modem. If the terminal has been set up properly, the following message appears on the screen: Sigrand SG-16B SHDSL modem V.2.4 Interface module M16-G Initialization complete 3.2 General purpose commands The modem is managed by a set of commands conventionally divided into two types: the “general purpose”...

  • Page 20: The Help Command

    The info command displays information about the firmware version, the modem uptime, and current status of the modem interfaces. : info Sigrand SG-16B SHDSL modem V.2.4 Setup mode: Terminal SHDSL firmware: V.5.00 Interface module M16-G...

  • Page 21: The Stat Command

    The stat command displays current status and statistics of the modem interfaces: : stat E1A: Long-Haul FRAMED CAS Code=HDB3 – ONLINE FAS_Sync=No CAS_Sync=No CV=0 FASE=0 Loop Loss: 37.5 dB DSL: Rate=3072 kbit/s Code=TCPAM32 MASTER – ONLINE LOSW=13 CRC6=14 RETRAIN=3 of 4 Loop Loss: 0.0 dB Noise Margin: +22.0 dB Total online time: 0 days 00:21:24...

  • Page 22: Dsl Interface Management

    : reboot Rebooting... Sigrand SG-16B SHDSL modem V.2.4 Interface module M16-G Initialization complete The update command is used to update the modem firmware. Detailed procedure of firmware reprogramming is discussed in chapter 4 of this Guide. Not recognized commands causes appearance of the message ...

  • Page 23: Master"/"Slave" Mode Selection

    : dsl DSL: Rate=2048 kbit/s Code=TCPAM16 MASTER – OFFLINE 3.3.1 “Master”/”slave” mode selection Configure one peer modem as “master”, do another one as “slave” for proper operation. This is performed by the dsl command with the master or slave options: : dsl master DSL: Rate=2048 kbit/s Code=TCPAM16 MASTER - OFFLINE : dsl slave...

  • Page 24: Line Coding Selection

    3.3.3 Line coding selection As mentioned above, different TСРАМ line coding modes are used to transmit data with different rates. Chart 1 704 Kbps TCPAM4 64 Kbps 1216 Kbps 192 Kbps TCPAM8 192 Kbps TCPAM16 3840 Kbps 6016 Kbps 256 Kbps TCPAM32 1000 2000...

  • Page 25: Link Statistics

    If the data rate is not within the permitted range for an entered line coding mode, the following message appears: invalid line code for this rate. 3.3.4 Link statistics Use the dsl command with the stat option to view link statistics: : dsl stat DSL: Rate=512 kbit/s Code=TCPAM8 SLAVE - ONLINE TX=1341 RX=1231 ERR=1 LOSW=12 CRC6=11 RETRAIN=2 of 5...

  • Page 26: How To Force A Retrain

    : dsl retrain DSL: Rate=512 kbit/s Code=TCPAM8 SLAVE – OFFLINE 3.4 E1 interface management The Sigrand SG-16G modem features one E1 (G.703/G.704, 2048 kbps) port. The following commands allow to manage the port: :help e1 E1 - show current E1 settings...

  • Page 27: The E1 Command

    The e1 command allows to view the statistics and to configure the E1 interface. Execution of the command without options and arguments shows current settings of the interface: : e1 E1A: Long-Haul FRAMED CAS Code HDB3 - ONLINE 3.4.1 Long/Short Haul modes The short option of the E1 command turns off the Е1 interface line amplifier.
  • Page 28 The error message follows up any attempt to enable superframing in unframed mode: : e1 crc4 Invalid option for unframed mode : e1 cas Invalid option for unframed mode Disabling superframes and frame synchronization is performed by the е1 command with the /framed option and the /crc4 and /cas keys. : e1 E1A: Long-Haul FRAMED CRC4 CAS Code=HDB3 –...

  • Page 29: Е1 Interface Statistics

    : e1 code ami E1A: Long-Haul FRAMED CRC4 CAS Code=AMI – ONLINE : e1 code hdb3 E1A: Long-Haul FRAMED CRC4 CAS Code=HDB3 – ONLINE  ITU-T G.703 recommendation requires the HDB3 line coding. 3.4.4 Е1 interface statistics Use the е1 command with the stat option to view the statistics: : e1 stat E1A: Long-Haul FRAMED CAS Code=HDB3 –...

  • Page 30: Timeslot Map

    3.4.5 Timeslot map The G.704 E1 frame structure consists of 32 8-bit channels (so-named “timeslots”) which have been assigned numbers from 0 to 31. The timeslot 0 is used to transmit the frame alignment signal (FAS) and the additional (service) bits (Sa, Si). The timeslots 1 through 31 are used to transmit payload data.
  • Page 31 Used timeslots: 17 Payload: 1088 kbit/s To add several timeslots specify those by a list: e1 map add 3 4 6, or by a range: e1 map add 8-11. To enable all timeslots simultaneously use the following command: e1 map add all. : e1 map add 3 4 6 E1A: Long-Haul FRAMED Code=HDB3 –...
  • Page 32 : e1 map del 1 2 3 E1A: Long-Haul FRAMED Code=HDB3 – ONLINE 01234567890123456789012345678901 ---***************************** Used timeslots: 29 Payload: 1856 kbit/s : e1 map del 7-14 E1A: Long-Haul FRAMED Code=HDB3 – ONLINE 01234567890123456789012345678901 ---****--------***************** Used timeslots: 21 Payload: 1344 kbit/s : e1 map del all E1A: Long-Haul FRAMED Code=HDB3 –...

  • Page 33: Timeslot 0

    3.4.5.1 Timeslot 0 The timeslot 0 usually is not included in a list of transmitted timeslots since it is used for framing synchronization and carries no payload data, but its transmission demands another 64 kbps of the DSL rate. If the timeslot 0 is used to transmit payload data in additional (service) bit positions, it may also be included to the list of transmitted timeslots: : e1 map add 0 E1A: Long-Haul FRAMED Code=HDB3 –...

  • Page 34: E1 Interface Behavior In The Automatic Dsl Rate

    384 kbps. 3.4.6 E1 interface behavior in the Automatic DSL rate selection mode E1 interface operation of the SG-16G modems has a number of features in the automatic DSL rate selection mode. The number of transmitted timeslots may vary from one connection session to another since the DSL rate is selected automatically per each connection session.
  • Page 35 timeslots are added. These are timeslots 17 through 22 (marked by plus “+”). All free timeslots are arranged as additional timeslots in ascending order starting from 1. The timeslot 0 cannot be used as an additional one. Upon disconnecting all additional timeslots are removed automatically. : dsl DSL: Rate=Auto...
  • Page 36 4. Updating built-in modem firmware Use the update command to update the built-in firmware of the Sigrand SG-16G modem in the following order: : update Load new image? (y/n) Y Upon entering procedure acknowledgement Y the memory buffer is clearing and the prompt to download the image file appears here: Clearing buffer memory...
  • Page 37 Clearing buffer memory... OK Loading image... OK Checking image... OK, Type=SG16HOST V.2.5 Program new image? (y/n) Y Enter acknowledgement Y to complete the write procedure: Checking BootLoader... OK Self-Programming... OK Rebooting... press N or Esc as a response to any prompt to cancel the update procedure: : update Load new image? (y/n) N...
  • Page 38 Manufacturer has been advised of the possibility of such damages. Warranty limitations: Warranty is void for modems operating on wires having aerial sections. MANUFACTURER ADDRESS Sigrand LLC, pr. Lavrentieva 6, Novosibirsk, Russia Phones +7 (383)-330-02-43, 332-94-37 Fax +7 (383)-332-02-43 www.sigrand.com...
  • Page 39 WARRANTY COUPON For Sigrand SG-16G modem Serial number _________________________________________ MFG date ____/____/200__ month year Quality checker_______________/_____________/ Stamp Seller Address Phone Sale date Stamp Signature Purchaser Address Phone Purchase date Stamp Signature...
  • Page 40 Appendix I Appendix I. General specifications of TPP cable Table I.1 Frequency response for twisted-pair cabling with copper conductor and PE-insulation (for reference only) Secondary ratings Primary ratings |Z|, Ω α, dB/km R~, Ω/km L, H/km*10 G,S/km*10 Conductor diameter 0.4 mm (26 AWG) 5.51 1.13 225.2...
  • Page 41 Table I.2 Cable loop resistance to conductor diameter ratio: Conductor diameter Loop resistance (mm) (Ω/km) 0.32 0.64...

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