H.323描述符不同导致电话不通案例

H.323描述符不同导致电话不通案例

问题描述：

如下组网，从电话1拨打电话2，电话2摘机后没有任何声音。3680E2是一台已经运行了1年的设备，版本为1.74-0010，跟其他点VOIP通信正常。3680E1是新设备，版本1.74-0107

 

电话1---西门子PBX----E1VI----3680E 1------IP------3680E 2----E1VI----西门子PBX---电话2

 

原因分析：

H323描述符是在H323通话过程中用来判断是否为我们的设备，如果一样即为我们的设备，这个时候在收到TCS ACK时打开逻辑通道，否则需要收到MSD（主从决定）请求才打开逻辑通道。因此当我们设备之间互通，且两边的H323描述符不一致的情况下，呼叫建立过程会处于等待MSD的状态，而我们的设备是不会主动发MSD请求的，就无法打开逻辑通道（在调试信息中会只看到TCS/TCS ACK的消息，没有OLC/OLC ACK消息），造成摘机后电话没有声音。

我们VRP1.74版本在发展过程中，由于各种原因对H323描述符的确省值修改过多次，有“Huawei Gateway”、“Standard Gateway”、“Vrp Gateway”、“Default Gateway”，VRP1.74-0010版本的缺省值应该是“Standard Gateway”，VRP1.74-0107版本的确省值为“Vrp Gateway”，目前两个版本都无法配置成对方的确省值（因为要通过命令行配置带空格的字符串需要程序中特殊处理）。

解决方法有三个：

（1）配置为快起

（2）配置两个版本的描述符为一样的字符串

（3）修改代码，使0107的版本能够配置0010的缺省值，在最新版本配置H323描述符为“Standard Gateway”。配置方法：在voice视图下执行voip h323 Standard Gateway即可。

 

附：主叫端调试信息（打开debug voice ipp all）

[RouterB-voice]

  IPP_VCC [  0]: Receive CCSetup Msg: CallerNumber=200, CalledNumber=100,FacilityLen=0

  IPP_VCC [  0]: Send IPCallProceeding Msg when receive CCSetup Msg

  IPP_VCC [  0]: Get VOIP dialpeer 100 in CCSetup Msg

  IPP_SOK [  0]: Send H225 AsynSocket Request when receive CCSetup Msg

  IPP_SOK [  0]: Receive H225 AsynSock Ack, sokid=288, src=1720@169.254.100.2, dst=1720@169.254.100.2

  IPP_225 [  0]: Send Setup Msg when 225 socket created

  IPP_225 [  0]: Setup Msg FastCOnnect=False, Tunnel=False

  IPP_225 [  0]: Receive CallProceeding Msg, crv=53, FastStart=FALSE, tunnel=FALSE

  IPP_225 [  0]: Receive Alerting Msg crv=53, faststart=FALSE, tunnel=FALSE, h245=169.254.100.1,FacilityLen=0

  IPP_VCC [  0]: Send IPAlerting Msg when receive Alerting Msg

[RouterB-voice]

[RouterB-voice]

[RouterB-voice]//被叫摘机后，只有终端能力集协商过程，没有打开逻辑通道过程，听不到对方声音

  IPP_225 [  0]: Receive Connect Msg crv=53, faststart=FALSE, tunnel=FALSE, h245=169.254.100.1,FacilityLen=0

  IPP_SOK [  0]: H245 AsynSocket request when receive Connect Msg

  IPP_VCC [  0]: Send IPConnect Msg when receive Connect Msg

  IPP_SOK [  0]: Receive H245 AsynSock Ack, sokid=289, src=0@169.254.100.2, dst=1800@169.254.100.2

  IPP_245 [  0]: Send H245 TCS Req Msg when create a 245 socket

  IPP_245 [  0]: Receive H245 TCS Request Msg, Code=10

  IPP_245 [  0]: Send H245 TCS Ack Msg when receive TCS Req Msg

  IPP_245 [  0]: Receive H245 TCS Ack Msg

[RouterB-voice]

[RouterB-voice]

  IPP_VCC [  0]: Receive CCRelease Msg,FacilityLen=0

  IPP_225 [  0]: Send ReleaseComplete Msg when receive CCRelease Msg

  IPP_C&C [  0]: IPCCB is released

[RouterB-voice]

[RouterB-voice]disp cur

  Now create configuration...

  Current configuration

  !

    version 1.74

    local-user 8041 service-type ftp password simple 8041

    sysname RouterB

    info-center console

    info-center console debugging

    firewall enable

    aaa-enable

    aaa accounting-scheme optional

    undo idle-timeout 

  !

  interface Aux0

    async mode flow

    link-protocol ppp

  !

  interface Ethernet0

    ip address 169.254.100.2 255.255.0.0

  !

  interface Ethernet1

  !

  voice-setup

    !                                    

    dial-program

      dial-expansion calling 3.. 0103..

      !

      entity 100 voip

        address ip 169.254.100.1

        match-template 100

      !

      entity 200 pots

        match-template 200

        line 0

                                         

[RouterB-voice]entity 100

  The voice entity's type is VoIP

[RouterB-voice-dial-entity100]

[RouterB-voice-dial-entity100]fast-connect  //配置为快起，OK

[RouterB-voice-dial-entity100]

[RouterB-voice-dial-entity100]

[RouterB-voice-dial-entity100]

[RouterB-voice-dial-entity100]

[RouterB-voice-dial-entity100]

[RouterB]

[RouterB]

  IPP_VCC [  0]: Receive CCSetup Msg: CallerNumber=200, CalledNumber=100,FacilityLen=0

  IPP_VCC [  0]: Send IPCallProceeding Msg when receive CCSetup Msg

  IPP_VCC [  0]: Get VOIP dialpeer 100 in CCSetup Msg

  IPP_SOK [  0]: Send H225 AsynSocket Request when receive CCSetup Msg

  IPP_SOK [  0]: Receive H225 AsynSock Ack, sokid=288, src=1720@169.254.100.2, dst=1720@169.254.100.2

  IPP_225 [  0]: Send Setup Msg when 225 socket created

  IPP_225 [  0]: Setup Msg FastCOnnect=True, Tunnel=False

  IPP_225 [  0]: Receive CallProceeding Msg, crv=54, FastStart=FALSE, tunnel=FALSE

  IPP_225 [  0]: Receive Alerting Msg crv=54, faststart=TRUE, tunnel=FALSE, h245=NONE,FacilityLen=0

  IPP_VCC [  0]: Send IPAlerting Msg when receive Alerting Msg

  IPP_SOK [  0]: Send RTP/RTCP Sock Req when receive Alerting Msg

  IPP_SOK [  0]: Rcv DATA SockAck, ids=289:290, RTP=16676@169.254.100.2, RTCP=16677@169.254.100.2

  IPP_VPP [  0]: Send Codec Msg when create RTP/RTCP socket OK: CodecType = G729

  IPP_225 [  0]: Receive Connect Msg crv=54, faststart=FALSE, tunnel=FALSE, h245=NONE,FacilityLen=0

  IPP_VCC [  0]: Send IPConnect Msg when receive Connect Msg

  IPP_VPP [  0]: Send voice packet 100 Len = 42

  IPP_VPP [  0]: Send voice packet 200 Len = 42

  IPP_VCC [  0]: Receive CCRelease Msg,FacilityLen=0

  IPP_225 [  0]: Send ReleaseComplete Msg when receive CCRelease Msg

  IPP_C&C [  0]: IPCCB is released

[RouterB]

[RouterB]entity 100

  The voice entity's type is VoIP

[RouterB-voice-dial-entity100]

[RouterB-voice-dial-entity100]undo fast-connect  //改为慢起后，不OK

[RouterB-voice-dial-entity100]

[RouterB-voice-dial-entity100]

  IPP_VCC [  0]: Receive CCSetup Msg: CallerNumber=200, CalledNumber=100,FacilityLen=0

  IPP_VCC [  0]: Send IPCallProceeding Msg when receive CCSetup Msg

  IPP_VCC [  0]: Get VOIP dialpeer 100 in CCSetup Msg

  IPP_SOK [  0]: Send H225 AsynSocket Request when receive CCSetup Msg

  IPP_SOK [  0]: Receive H225 AsynSock Ack, sokid=288, src=1720@169.254.100.2, dst=1720@169.254.100.2

  IPP_225 [  0]: Send Setup Msg when 225 socket created

  IPP_225 [  0]: Setup Msg FastCOnnect=False, Tunnel=False

  IPP_225 [  0]: Receive CallProceeding Msg, crv=55, FastStart=FALSE, tunnel=FALSE

  IPP_225 [  0]: Receive Alerting Msg crv=55, faststart=FALSE, tunnel=FALSE, h245=169.254.100.1,FacilityLen=0

  IPP_VCC [  0]: Send IPAlerting Msg when receive Alerting Msg

  IPP_225 [  0]: Receive Connect Msg crv=55, faststart=FALSE, tunnel=FALSE, h245=169.254.100.1,FacilityLen=0

  IPP_SOK [  0]: H245 AsynSocket request when receive Connect Msg

  IPP_VCC [  0]: Send IPConnect Msg when receive Connect Msg

  IPP_SOK [  0]: Receive H245 AsynSock Ack, sokid=289, src=0@169.254.100.2, dst=1800@169.254.100.2

  IPP_245 [  0]: Send H245 TCS Req Msg when create a 245 socket

  IPP_245 [  0]: Receive H245 TCS Request Msg, Code=10

  IPP_245 [  0]: Send H245 TCS Ack Msg when receive TCS Req Msg

  IPP_245 [  0]: Receive H245 TCS Ack Msg

  IPP_VCC [  0]: Receive CCRelease Msg,FacilityLen=0

  IPP_225 [  0]: Send ReleaseComplete Msg when receive CCRelease Msg

  IPP_C&C [  0]: IPCCB is released