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haicli
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本帖最后由 haicli 于 2018-3-20 16:27 编辑
场景:
IP Phone 8865NR 注册到CUCM;
CUCM trunk 到 2921-V,通过E1外出呼叫;

现象:
所有的电话都可以注册到CUCM并可以拔打所有类型的电话号码,但是有些新注册的8865NRs不能拨打长途呼叫。

Troubleshooting:
debug isdn Q931:
Sending Complete
Bearer Capability i = 0x8890(0x8090A3 is more common)
Standard = CCITT
Transfer Capability = Unrestricted Digital
Transfer Mode = Circuit
Transfer Rate = 64 kbit/s
Channel ID i = 0xA9839F
Exclusive, Channel 31
Calling Party Number i = 0x2181, '22800828'
Plan:ISDN, Type:National
Called Party Number i = 0xA1, '4006680680'
Plan:ISDN, Type:National
Jun 23 06:22:16.547: ISDN Se0/0/0:15 Q931: RX <- STATUS pd = 8 callref = 0x8BB6
Cause i = 0x82E46C - Invalid information element contents
Call State i = 0x01
Jun 23 06:22:16.547: ISDN Se0/0/0:15 Q931: RX <- CALL_PROC pd = 8 callref = 0x8BB6
Channel ID i = 0xA9839F
Exclusive, Channel 31
Jun 23 06:22:19.307: ISDN Se0/0/0:15 Q931: RX <- DISCONNECT pd = 8 callref = 0x8BB6
Cause i = 0x80C1 - Bearer capability not implemented
Jun 23 06:22:19.307: ISDN Se0/0/0:15 Q931: TX -> RELEASE pd = 8 callref = 0x0BB6
Jun 23 06:22:19.339: ISDN Se0/0/0:15 Q931: RX <- RELEASE_COMP pd = 8 callref = 0x8BB6
Cause i = 0x80C1 - Bearer capability not implemented

You can see the lines in red, abnormal error codes indicate there has a capability set mismatch, After Topic search, most of the cases related to IP Phone with Video enabled(8845,8865,9951 etc.) try to negotiate video capability with PSTN, PSTN doesn't support video so PSTN returns a Cause i = 0x80C1 to user.

解决方法 1:
go to CUCM-->device-->;Phone-->Video Capabilities:disabled.
this way the Video IP Phones lose it's value, they can't make video phone calls to each other even inside company.

解决方法 2:
Don't disable video in CUCM, do this in Voice gateway 2921:
conf t
voice-port 0/0/0:15
bearer-cap speech <--------add this command solved this issue.

评论
13nash
Level 8
Level 8
哎,语音真不懂
xuxianda7
Spotlight
Spotlight
谢谢分享,语音这一块一直都想学习,可惜没有实际环境来学习
yangkai_716
Spotlight
Spotlight
好贴,感谢楼主分享:)
Yanli Sun
Community Manager
Community Manager
感谢楼主分享:handshake
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