voptech IP20 User Manual
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voptech IP20 User Manual

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IP20/IP20P

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  • Page 1 User Manual IP20/IP20P...

  • Page 2: Safety Notices

    Safety Notices Please read the following safety notices before installing or using this phone. They are crucial for the safe and reliable operation of the device.  Please use the external power supply that is included in the package. Other power supplies may cause damage to the phone, affect the behavior or induce noise.

  • Page 3: Table Of Contents

    Table of Content INTRODUCING IP20/IP20P VOIP PHONE ................5 IP20/IP20P ..............5 HANK YOU FOR YOUR PURCHASING ......................... 5 ELIVERY ONTENT ............................ 6 EYPAD ......................7 ORT FOR CONNECTING ........................ 8 CON INTRODUCTION ......................... 8 INTRODUCTION INITIAL CONNECTING AND SETTINGS................10 ......................
  • Page 4 ................. 18 ROGRAMMABLE ONFIGURATION IP20/IP20P’S OTHER FUNCTIONS ..................21 ......................... 21 ANDDOWN ......................21 NONYMOUS ..........................21 ..........................21 ......................... 21 EDIAL ......................... 22 ALL COMPLETION ......................22 EADSET ......................... 22 OWER IGHT DTMF ........................... 22 5.10 ........................22 UTGOING 5.11...

  • Page 5: Introducing Ip20/Ip20P Voip Phone

    1 Introducing IP20/IP20P VoIP Phone 1.1 Thank you for your purchasing IP20/IP20P Thank you for your purchasing IP20/IP20P, IP20/IP20P is a full-feature telephone that provides voice communication over the same data network that your computer uses. This phone’s functions not only much like a traditional...

  • Page 6: Keypad

    1.3 Keypad Key name Function Description Navigation key assist users for operating. In desktop, dialer, calling, desktop long pressed state they have special function. Navigation You can configure through the web page according to your patterns of use. Access to phone book, check the record list and add new records and revise the record.

  • Page 7: Port For Connecting

    Indicator If the light blinking, indicate the phone has missed light call. Keys combination, include functions such as History/Directory/DND/Menu/Del/Redial/Send/ Soft key 1/2/3/4 Quit/Answer/Divert/Reject/Hold/Transfer/Conf/Cl ose and so on. View the Missed call, Incoming Call and Outgoing History Call. Digital Inputting the phone number or DTMF. keyboard DSS keys You can configure them in the web page.

  • Page 8: Icon Introduction

    1.5 Icon introduction Icon Description Call out Call in Call hold Auto answer Call mute Contact DND(Do not Disturb) In hand-free mode In handset mode In headset mode Missed call Call forward 1.6 LED introduction Table 1 Programmable key LEDs for BLF LED Status Description Steady green...
  • Page 9 Steady green The object is online. Slow blinking red The object is ringing. Steady red The object is active. Fast blinking red The object is failed. No subscribe. Table 3 Programmable key LEDs for line LED Status Description Steady green The account is active.

  • Page 10: Initial Connecting And Settings

    2 Initial connecting and Settings 2.1 Connect the phone Connect to network 2.1.1 Step 1: Connect the IP Phone to the corporate IP telephony network. Before you connect the phone to the network, please check if your network can work normally.

  • Page 11: Power Adaptor Connection

    1. Plug power adaptor to power socket. 2. Plug power adaptor’s DC output to the DC5V port of IP20/IP20P to start 3. There will be displayed black line and “INITIALIZING” on the screen. After finishing startup, phone will show greeting, current date and time and so forth.
  • Page 12 IP20/IP20P uses DHCP to get WAN IP configurations, so phone could access to network as long as there is DHCP server in it. If there is no DHCP server available, phone has to be changed WAN network setting to Static IP or PPPoE.

  • Page 13: Ip20/Ip20P's Basic Function

    3 IP20/IP20P’s basic function 3.1 Making a call Call Device 3.1.1 You can make a phone call via the following devices: 1. Pick up the handset, icon will be showed in the idle screen. 2. Press the Speaker button, icon will be showed in the idle screen.

  • Page 14: Dnd

    3.3 DND Press DND softkey to active DND Mode. Further incoming calls will be rejected and the display shows: icon. Press DND softkey twice to deactivate DND mode. You can find the incoming call record in the Call History. 3.4 Call Forward This feature allows you to forward an incoming call to another phone number.

  • Page 15: Call Transfer

    Then the called will not hear you, but you can hear the called. Press it again to get the phone to normal conversation. 3.8 Call transfer 1. Blind Transfer During talk, press the key Transf, and then dial the number that you want to transfer to, and finished by "#".

  • Page 16: Ip20/Ip20P's Advanced Function

    4 IP20/IP20P’s advanced function 4.1 Call pickup Call pickup is implemented by simulating pickup function of PBX. it’s that, when A calls B, B rings but no answer, at this moment, C can hook off and input an appointed prefix plus B’s number, pick up A’s call and talk with A.

  • Page 17: Click To Dial

    *3* is appointed prefix code. After making the above configuration, A can dial *3* plus B’s phone number to make the redial function. *4* is appointed prefix code. After configuration, A can dial *4* to cancel redial function. User can set prefix in random, in the case of no affecting current dialing rules. 4.4 Click to dial When user A browses in an appointed Web page, user A can click to call user B via a link (this link to user B), then user A’s phone will ring, after A hooks...

  • Page 18: Memo

    press OK, then use the navigation keys to select the line from which you want to send, then Send. 4) If you want to write a message, you can press New and enter message. Use the 2aB softkey to change the Input Method. When you input the message you want to send, press OK, then use the navigation keys to select the line from which you want to send, then Send.
  • Page 19 1. Set the type as Memory Key Press Menu->Settings->Basic Settings->Enter->Keyboard->DSS Key Settings, you have two options: Line Key Settings and Function Key Settings, choose one you want to make the assignment, use the navigation key to choose the type as memory key. In the Dial field, you have some options, such as Normal, Speed Dial, Intercom, BLF, Presence, MWI.，Call Park.
  • Page 20 Choose one and it will have corresponding function.  None  Auto Redial Off  Auto Redial On  Call Back  Call Forward  DND  Flash  Headset  History  Hold  Hot Desking: Pressing the key, you can clear all sip information and register yourself sip information.

  • Page 21: Ip20/Ip20P's Other Functions

    5 IP20/IP20P’s other functions 5.1 Auto Handdown Press Menu ->Features-> Enter->Auto Handdown-> Enter. 2. Set the Mode Enable through the navigation key, then set Time, unit is minute, then press Save. 3. When the call ends, after the time that you have set, the phone will back to the idle interface.

  • Page 22: Call Completion

    Enable, you also need to set Interval and Times, and then press Save. 3. After enable auto redial, calling out someone, if he is in busy, it will pop up a prompt box whether to auto redial, press OK, the phone will call out him according the Interval and Times that you set.

  • Page 23: Pre Dial

    5.11 Pre Dial 1. Press Menu ->Features-> Pre Dial-> Enter. 2. Enable this function,you will realize Pre-Dial founction. 5.12 Password Dial 1. Press Menu ->Features-> Enter->Password Dial-> Enter. 2. Enable this function, you can also set Prefix and Length. For example，you want call out 1234567 and you set Password Dial Prefix 123 and Password Length 3, then enter the dial interface and input 1234567, and then the screen will show 123***7.

  • Page 24: Ip20/Ip20P's Basic Settings

    6 IP20/IP20P’s basic settings 6.1 Keyboard 1. Press Menu ->Settings-> Enter->Basic Settings-> Enter->Keyboard->Enter. 2. There are four items: DSS Key settings, Programmable Keys, Desktop Long Pressed, SoftKey, You can set up respectively on them. Press the key Enter to the interface, then use the navigation keys to choose the function for the key according to you want.

  • Page 25: Greeting Words

    2. You can enter the message and press Save, it will display in the phone screen when the phone start up. 6.7 Language 1. Press Menu ->Settings-> Enter->Basic Settings-> Enter->Language ->Enter. 2. IP20/IP20P support three languages, you can use the navigation keys to choose. The default two languages are English and Chinese.

  • Page 26: Ip20/Ip20P's Advanced Settings

    7 IP20/IP20P’s advanced settings 7.1 Accounts Press Menu->Enter->Advanced settings, and then input the password to enter the interface, the default password is 123. You can set it through the web page. Then choose Account then press Enter, you can do some sip settings.

  • Page 27: Web Configuration

    8 Web configuration 8.1 Introduction of configuration Ways to configure 8.1.1 IP20/IP20P has three different ways to different users.  Use phone keypad.  Use web browser (recommendatory way).  Use telnet with CLI command. Password Configuration 8.1.2 There are two levels to access to phone: root level and general level. User with root level can browse and set all configuration parameters, while user with general level can set all configuration parameters except SIP (1-2) or IAX2’s...

  • Page 28: Configuration Via Web

    After you configure the IP phone, you need click save button in config under Maintenance in the left catalog to save your configuration. Otherwise the phone will lose your modification after power off and on. 8.3 Configuration via WEB BASIC 8.3.1 STATUS 8.3.1.1...
  • Page 29 Wizard Please select the proper network mode according to the network condition. IP20/IP20P provide three different network settings:  Static: If your ISP server provides you the static IP address, please select this mode, and then finish Static Mode setting. If you don’t know about parameters of Static Mode setting, please ask your ISP for them.
  • Page 30 this domain to the end of the domain which you input before and parse it again. Primary DNS Input your primary DNS server address. Secondary DNS Input your standby DNS server address. Display Name Set the display name. Server Address Input your SIP server address.

  • Page 31: Call Log

    Display detailed information that you manual config. Choose DHCP MODE, click Nest can config SIP (default SIP1) simply, also can browse too. Click Back can return to the last page. Like Static IP MODE. Choose PPPoE MODE, click Nest can config the PPPoE account/password and SIP (default SIP1) simply, also can browse too.

  • Page 32: Network

    LANGUAGE 8.3.1.4 LANGUAGE Field name explanation Language Set the language of phone, English is default. The greeting words will display on LCD when phone Greeting Words is idle. It can support 12 chars. the default chars are VOIP PHONE. Notice: the maximal length of the greeting message is twelve English characters and five Chinese characters.
  • Page 33 Shows the time of getting MAC address Please select the proper network mode according to the network condition. IP20/IP20P provide three different network settings:  Static: If your ISP server provides you the static IP address, please select this mode, and then finish Static Mode setting. If you don’t know about parameters of Static Mode setting, please ask your ISP for them.

  • Page 34: Lan Config

    DNS Domain you input cannot be parsed, phone will automatically add this domain to the end of the domain which you input before and parse it again. Primary DNS Input your primary DNS server address. Secondary DNS Input your standby DNS server address. If you uses PPPoE mode, you need to make the above setting.
  • Page 35 Subnet Mask Specify LAN Netmask. Select the DHCP server of LAN port or not. After you DHCP Service modify the LAN IP address, phone will amend and adjust the DHCP Lease Table and save the result amended automatically according to the IP address and Netmask.
  • Page 36 In chart 1, there is a layer 2 that switches without setting VLAN. Any broadcast frame will be transmitted to the other ports except the send port. For example, a broadcast information is sent out from port 1 then transmitted to port 2,3a nd 4.

  • Page 37: Qos Configuration

    QoS Configuration Link Layer Discovery Protocol (LLDP) Settings Enable LLDP Enable LLDP by selecting it. After enabling LLDP Learn, telephone can Enable Learning automatically learn the data of DSCP, 802.1p, VLAN Function ID from the switch. If the data is different from the data of the LLDP server, telephone will change its own value as the value of the switch (Synchronous with VLAN in switch).

  • Page 38: Service Port

    SERVICE PORT Field name explanation Service Port Settings Web Server Type Specify Web Server Type. HTTP Port Set web browser port, the default is 80 port, if you want to enhance system safety, you'd better change it into non-80 standard port; Example: The IP address is 192.168.1.70.

  • Page 39: Dhcp Service

    DHCP SERVICE 8.3.2.5 DHCP SERVICE Field name explanation DHCP Lease Table IP-MAC mapping table. If the LAN port of the phone connects to a device, this table will show the IP and MAC address of this device. Shows the DHCP Lease Table， the unit of Lease time is Minute. Lease Table Name Specify the name of the lease table.
  • Page 40 Select name of lease table, click the Delete button will delete the selected lease table from DHCP lease table. Enable Select DNS Relay, the default is enabled. Click the DNS Relay Apply button to become effective. Notice: 1) The size of lease table cannot be larger than the quantity of C network IP address.
  • Page 41 TIME&DATE Field name explanation Simple Network Time Protocol (SNTP) Settings Enable SNTP Enable SNTP by selecting it. Enable DHCP Time Enable DHCP Time by selecting it, then the phone will automatically synchronize the standard time. Primary Server Set SNTP Primary Server IP address. Secondary Server Set SNTP Secondary Server IP address.

  • Page 42: Voip

    Enable Enable daylight saving time. Offset(minutes) Setup the variety length. Month Setup start and end month. Week Setup start and end week. Setup start and end day. Hour Setup start and end hours. Minute Setup start and end minutes. Manual Time Settings Notice: First of all,you need to disable the SNTP service, and above the date hours minutes each of which is required to complete and submit to make manual.

  • Page 44: Sip Config

    SIP Config Field name explanation SIP Line Choose line to set info about SIP, there are 4 lines to choose. You can switch by【Load】button. Basic Settings Status Shows if the phone has been registered the SIP server or not; or so, show Unapplied. Server Address Input your SIP server address.
  • Page 45 Codecs desired to move to the other list. Advanced SIP Setting Select call forward mode, the default is Off. Off: Close down calling forward. Forward Type Busy: If the phone is busy, incoming calls will be forwarded to the appointed phone. No answer: If there is no answer, incoming calls will be forwarded to the appointed phone after a specific.
  • Page 46 SIP Server. MWI Number Specify the MWI Number; Please contact your system administrator for the connecting code. Different systems have different codes. Subscribe Period(s) Overtime of resending subscribe packet. Suggest using the default configuration. Conference Type Specify the Conference Type, if you select the local, you needn’t input the conference number.
  • Page 47 will send message to the server, and the server will turn on the function immediately. When there are calls to the extension, the server will forward it to the set number automatically based the forward type. And the IP phone will not show the record in the call history anymore.
  • Page 48  DTMF_RFC2833 DTMF Type  DTMF_SIP_INFO Different VoIP Service providers may provide different modes. Local Port Set sip port of each line. Ring Type Set ring type of each line. Enable Via Rport Enable/Disable system to support RFC3581. Via rport is special way to realize SIP NAT. Enable PRACK Enable or disable SIP PRACK function, suggest use the default config.
  • Page 49 Enable user=phone Enable user=phone by selecting it, it is contained in the invite sip message, in order to be compatible with server. Enable Missed Call Enable the missed call log by it, the phone will save the missed call log into the call history record and display the missed calls on the idle screen, or won’t save the missed call log into the call history record and display the missed calls on the idle screen.

  • Page 50: Iax2 Config

    IAX2 8.3.3.2 IAX2 Config Field name explanation Status Shows if the phone has been registered the IAX2 server or not. Server Address Input your IAX2 server address. Server Port Set your IAX2 server port, the default is 4569. Account Input your IAX2 register account name. Password Input your IAX2 register password.
  • Page 51 Echo Test Text Specify echo test text’s name. Refresh Time Set expire time of IAX2 server register, you can set it between 60 and 3600 seconds. Enable Start to register the IAX2 server or not by selecting it or Registration not.
  • Page 52 Simple Traversal of UDP through NATs (STUN) Settings STUN NAT Traversal Shows STUN NAT Transverse estimation, true means STUN can penetrate NAT, while False means not. Server Address Set your SIP STUN Server IP address. Server Port Set your SIP STUN Server Port. Blinding Period(s) Set STUN blinding period(s).
  • Page 53 code 010 before local phone number, but you can also dial number 1 instead of 010 after we make a setting according to this dial rule. For example, you want to dial 01062213123, but you need dial only 162213123 to realize your long distance call after you make this setting.
  • Page 54 matching, you need input your desired phone number in this blank, and then you need dial the phone number to realize calling to what the phone number is mapped. In the prefix matching, you need input your desired prefix number and T; then dial the prefix and a phone number to realize calling to what your prefix number is mapped.
  • Page 55 This means any phone No. that starts with your set phone number will be sent via SIP2 line after the first several digits of your dialed phone number are deleted according to delete length. This setting will realize When you dial speed dial function, after “2”, the SIP1 you dialing the numeric...

  • Page 56: Phone

    PHONE 8.3.4 AUDIO 8.3.4.1 In this page, you can configure voice codec, input/output volume and so on. AUDIO Configuration Field name explanation First Codec The first preferential DSP codec: G.711A/u, G.722, G.723.1,726-32 G.729AB,None. Second Codec The second preferential DSP codec: G.711A/u, G.722, G.723.1,726-32 G.729AB,None.
  • Page 57 Speakerphone Specify Speakerphone Volume grade. volume Ring Volume Specify Ring Volume grade. G722 Timestamps 160/20ms or 320/20ms is available. G723.1 Bit Rate 5.3 kb/s or 6.3 kb/s is available. Tone Standard Select Tone Standard. Enable VAD Select it or not to enable or disable VAD. If enable VAD, G729 Payload length could not be set over 20ms.
  • Page 58 FEATURE Field name explanation Do Not Select DND, the phone will reject any incoming call, the callers Disturb will be reminded by busy, but any outgoing call from the phone will work well. If you select Ban Outgoing to enable it, and you cannot dial out Outgoing any number.
  • Page 59 Auto Redial Specify the Auto Redial interval. Times Auto Open this function, if there is a headphones in IP20, you can Headset press “ answer” key or line key to answer a call with the headset Enable Call Enable Call Completion by selecting it.
  • Page 60 ring tone. Turn Off Enable Turn Off Power Light by selecting it. Power Light Emergency Specify the Emergency Call Number. Despite the keyboard is Call locked, you can dial the emergency call number. Number Enable Enable Password Dial by selecting it, When number entered is Password beginning with the password prefix, the following N numbers Dial...
  • Page 61 Block out then you cannot dial out any phone number whose prefix is 001. X and are wildcard x means matching any single digit. For example, 4xxx expresses any number with prefix 4 which length is 4 will be forbidden to dialed out means matching any arbitrary number digit.
  • Page 62 Field name explanation Basic Setting Press "#" to Send Set Enable/Disable the phone ended with “#” dial. Dial Fixed Length Specify the Fixed Length of phone ending with. Set the timeout of the last dial digit. The call will be Send after （3-30）...
  • Page 63 used simultaneously, System will stop dialing and send number according to your set rules. CONTACT 8.3.4.4 You can input the name, phone number and select ring type for each name here. Contact Field name explanation Phonebook Table Name Shows the name corresponding to the phone number.
  • Page 64 Notice: the maximum capability of the phonebook is 500 items, you can select many or a contact to add to group and add to blacklist, and delete many or a contact, and delete all contacts. Add Contact List Name Specify the name corresponding to the phone number.

  • Page 65: Remote Contact

    REMOTE CONTACT 8.3.4.5 You need to match a XML Phonebook address and you can directly access to the corresponding remote phonebook on the phone. For example: Set the Phonebook Name as fanvil, Server URL is tftp://192.168.1.3/admin/phonebook/index.xml. Or Set the Phonebook Name as ldap, Server URL is ldap://192.168.1.3/dc=winline,dc=com.

  • Page 66: Function Key

    FUNCTION KEY 8.3.5 FUNCTION KEY 8.3.5.1 Function Key Field name explanation Contrast Set contrast of screen. Enable Backlight Set enable/disable backlight. Line Key Settings Line: select Auto, SIP1, SIP2 or IAX2 in function key type. After you set it, you pick up handset or hands-free, press this function key, and then you can use the corresponding SIP line.
  • Page 67 URL: You can input remote book url. Value Set the type parameter values. Line Choose which lines to use this feature. Subtype Select the function parameters Key Event and Memory Event. Pickup Number Please input the pickup number When SubType is BLF or presence .
  • Page 68 EXIT KEY 8.3.5.2 EXT KEY has the same usage with the Function key. “In” port connects the phone, “Out” port connects the next one, if there is only, you don’t need for power supply, if there are more than one, you need supply 5V power for the first one, and use RJ-45 direct connector.

  • Page 69: Maintenance

    SOFTKEY 8.3.5.3 SOFTKEY You can configure different functions in different screens for every softkey. Maintenance 8.3.6 Auto Provision 8.3.6.1...

  • Page 70: Auto Provision

    Fanvil endpoint supports PnP and DHCP and Phone Flash to obtain the parameters. The PnP and DHCP and Phone Flash are all deployed, endpoint will go by the following process to try to obtain the server address and other parameters, when it boots up: DHCP option ...
  • Page 71 Encrypt Key Configuration file is encrypted. Save Autoprovision Save the username and password authentication Information message of http/https/ftp and input ID message in the phone until the url in the server changes. DHCP Option Setting DHCP Option Specify DHCP Option. DHCP option supports DHCP Setting custom option and DHCP option 66 and DHCP option 43 to obtain the parameters.

  • Page 72: Syslog Configuration

    TR069 Auto Login Enable TR069 Auto Login by selecting it. "Inform" Sending Specify the “inform” Sending Period, unit is second. Period SYSLOG 8.3.6.2 Syslog is a protocol which is used to record the log messages with client/server mechanism. Syslog server receives the messages from clients, and classifies them based on priority and type.

  • Page 73: Config Setting

    SIP Log Level Set the level of SIP log. IAX2 Log Level Set the level of IAX2 log. Enable Syslog Select it or not to enable or disable syslog. Web Capture Start Click the start button when you need capture the WAN packet stream of the phone, then open or save the file as the interface.
  • Page 74 UPDATE 8.3.6.4 You can update your configuration with your config file in this web page. Update Field name Explanation Web Update Click the browse button, find out the config file saved Web Update before or provided by manufacturer, download it to the phone directly, press “Update”...

  • Page 75: Access Configuration

    FTP/TFTP server, name and save it. 3. Config fie import: Download the config file to phone from FTP/TFTP server. The configuration will be effective after the phone is reset. 4. Phone book export (.vcf): Upload the phonebook file to FTP/TFTP server, name and save it. 5.

  • Page 76: Security

    phone by the phone‘s key board. The password is digit. This table shows the current user existed. User Set account user name. User Level Set user level, Root user has the right to modify configuration, General can only read. Password Set the password.

  • Page 77: Firewall Configuration

    WEB Filter User could make some device own IP, which is pre-specified, access to the MMI of the phone to config and manage the phone. Field name explanation Web Filter Table Settings: Add or delete the IP address segments that access to the phone. Set initial IP address in the Start IP column, Set end IP address in the End IP column, and click Add to add this IP segment.
  • Page 78 networks set in rules for security. Firewall, is also called access list, is a simple implementation of a Cisco-like access list (firewall). It supports two access lists: one for filtering input packets, and the other for filtering output packets. Each kind of list could be added 10 items. We will give you an instance for your reference.
  • Page 79 DMZ config: In order to make some intranet equipment support better service for extranet, and make internal network security more effectively, these equipment open to extranet need be separated from the other equipment not open to extranet by the corresponding isolation method according to different demands. We can provide the different security level protection in terms of the different resources by building a DMZ region which can provide the network level protection for the equipment environment, reduce the risk which is caused by providing...
  • Page 80 NAT Configuration Field name explanation IPSec ALG It is an encryption technology. Select it to enable IPSec ALG, the default is enabled. FTP is a service of connection layer which can FTP ALG transform intranet IP into extranet IP when intranet IP is sending out packet.

  • Page 81: Vpn Configuration

    8.3.7.4 This web page provides us a safe connect mode by which we can make remote access to enterprise inner network from public network. That is to say, you can set it to connect public networks in different areas into inner network via a special tunnel.

  • Page 82: Logout

    Address VPN User Set User Name access to VPN L2TP Server. VPN Password Set Password access to VPN L2TP Server. SECURITY 8.3.7.5 Security Field name explanation Update Security File Select Security File Select the security file you want to update, then click Update button to update.

  • Page 83: Appendix

    9 Appendix 9.1 Specification Hardware 9.1.1 Item IP20/IP20P(P) Adapter Input: 100-240V (Input / Output) Output: 5V 1A port 10/100Base- T RJ-45 1 PORT 10/100Base- T RJ-45 1 PORT Power Idle: 2.5W/Active: 2.8W Consumption LCD Size 128x48 74 x 28mm Operation 0～40℃...

  • Page 84: Network Features

     Automatically select calling line, if one line can’t be connected, the phone can automatically switch to other line to call.  9 kinds of ring types and 3 user-defined music rings  DTMF Relay: support SIP info, DTMF Relay, RFC2833 ...

  • Page 85: Maintenance And Management

     Wan Port supports main DNS and secondary DNS server can select dynamically to get DNS in DHCP mode or statically set DNS address.  Support DHCP client on WAN  Support DHCP server on LAN  QoS with DiffServ ...

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