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CUCM和VC在呼叫的体验单向音频在他们之间

2015 年 8 月 28 日 - 机器翻译
其他版本: PDFpdf | 英语 (2015 年 4 月 23 日) | 反馈

简介

本文描述如何排除故障呼叫的单向音频问题在视频通信服务器(VC)和Cisco Unified Communications Manager (CUCM)之间。

贡献用Ishan Sambhi, Cisco TAC工程师

问题

象这样的一呼叫,终端1-----H323----VCS----SIP----CUCM---Endpoint 2,也许导致终端1听不到终端2.的单向音频。

这是从VC的日志分析。

VC发送200 OK给CallManager :

2014-01-23T12:40:10+11:00 vcs-cont-pro-1 tvcs: UTCTime="2014-01-23 01:40:10,296"
Module="network.sip" Level="DEBUG": Dst-ip="10.69.12.2" Dst-port="60493"
SIPMSG:
|SIP/2.0 200 OK
Via: SIP/2.0/TCP 10.69.12.2:5060;branch=z9hG4bK2359e3e241306;received=
10.69.12.2;ingress-zone=CUCMNeighbour
Call-ID: 8935a699d9e9e3f8@127.0.0.1
CSeq: 102 INVITE
Contact: <sip:AVS.EX60.-.Elliott@172.17.254.1>
From: <sip:00419241145@10.69.11.1:5060>;tag=6417ce1c-8b93-4ba0-859a-ad892a39
e373-92748854
To: <sip:AVS.EX60.-.Elliott@172.17.254.1>;tag=27b6f95b717b59fc
v=0
o=tandberg 0 3 IN IP4 127.0.0.1
s=-
c=IN IP4 172.17.254.1
b=AS:512
t=0 0
m=audio 51390 RTP/AVP 0 101
b=TIAS:64000
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=sendrecv
a=rtcp:51391 IN IP4 172.17.254.1

在MasterSlaveDetermination前, VC设法发送OpenLogicalChannel (OLC)到终端,导致OLC的终端拒绝:

2014-01-23T12:40:10+11:00 vcs-cont-pro-1 tvcs: UTCTime="2014-01-23 01:40:10,366"
Module="network.h323" Level="DEBUG": Dst-ip="172.19.83.180" Dst-port="11158"
Sending H.245 PDU:
value MultimediaSystemControlMessage ::= request : openLogicalChannel :
{
forwardLogicalChannelNumber 1,
forwardLogicalChannelParameters
{
dataType audioData &colon; g711Ulaw64k : 40,
multiplexParameters h2250LogicalChannelParameters :
{
sessionID 1,
mediaControlChannel unicastAddress : iPAddress :
{
network 'AC11FE01'H,
tsapIdentifier 51669
},
transportCapability
{
mediaChannelCapabilities
{
{
mediaTransport ip-UDP : NULL
}
}
}
}
}
}

这是从终端的MasterSlaveDetermination :

2014-01-23T12:40:10+11:00 vcs-cont-pro-1 tvcs: UTCTime="2014-01-23 01:40:10,475"
Module="network.h323" Level="INFO": Src-ip="172.19.83.180" Src-port="11158"
Detail="Received H.245 MasterSlaveDeterminationRequest "
2014-01-23T12:40:10+11:00 vcs-cont-pro-1 tvcs: UTCTime="2014-01-23 01:40:10,475"
Module="network.h323" Level="DEBUG": Src-ip="172.19.83.180" Src-port="11158"
Received H.245 PDU:
value MultimediaSystemControlMessage ::= request : masterSlaveDetermination :
{
terminalType 190,
statusDeterminationNumber 8028716
}

这是MasterSlaveDeterminationAck对终端:

2014-01-23T12:40:10+11:00 vcs-cont-pro-1 tvcs: UTCTime="2014-01-23 01:40:10,475"
Module="network.h323" Level="INFO": Dst-ip="172.19.83.180" Dst-port="11158"
Detail="Sending H.245 MasterSlaveDeterminationAckResponse Master"
2014-01-23T12:40:10+11:00 vcs-cont-pro-1 tvcs: UTCTime="2014-01-23 01:40:10,475"
Module="network.h323" Level="DEBUG": Dst-ip="172.19.83.180" Dst-port="11158"
Sending H.245 PDU:
value MultimediaSystemControlMessage ::= response : masterSlaveDeterminationAck :
{
decision master : NULL
}

因为OLC在MasterSlaveDetermination前,进来OLC的终端的拒绝导致单向音频。

2014-01-23T12:40:10+11:00 vcs-cont-pro-1 tvcs: UTCTime="2014-01-23 01:40:10,519"
Module="network.h323" Level="INFO": Src-ip="172.19.83.180" Src-port="11158"
Detail="Received H.245 OpenLogicalChannelRejResponse "
2014-01-23T12:40:10+11:00 vcs-cont-pro-1 tvcs: UTCTime="2014-01-23 01:40:10,519"
Module="network.h323" Level="DEBUG": Src-ip="172.19.83.180" Src-port="11158"
Received H.245 PDU:
value MultimediaSystemControlMessage ::= response : openLogicalChannelReject :
{
forwardLogicalChannelNumber 1,
cause masterSlaveConflict : NULL
}

解决方案

此问题是由Cisco Bug ID CSCuc98144引起的,并且修正是启用允许空邀请在CUCM区域的VC区域配置文件。这强制VC派出初始邀请与预先配置的会话描述协议(SDP),允许呼叫连接在两个方向的音频。

VC配置下- >区域- >区域,挑选CUCM区域,和更改在此屏幕画面指示的字段:

其它选项是升级VC对问题是解决的版本X8.1.1。

注意:这只是一个原因呼叫也许有单向音频。


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Document ID: 118671