Unity Connection TIMG无法正确路由呼叫
简介
本文档介绍进入从属T1 IP媒体网关(TIMG)或PBX IP媒体网关(PIMG)的呼叫未正确路由时的问题。TIMG和PIMG使PBX能够集成到Unity Connection以进行语音邮件访问。某些PBX要求此集成通过简化消息台接口(SMDI)、MCI或MD-110。这意味着呼叫信息将通过串行端口连接从PBX传递到TIMG或PIMG。串行电缆连接的TIMG或PIMG将配置为主电缆。如果需要其他TIMG或PIMG，这些TIMG将配置为从设备，并会向主设备寻求呼叫信息。
问题
有两个或多个TIMG/PIMG具有主和从配置。当呼叫进入主设备时，呼叫将转接到正确的Unity Connection语音信箱问候语。
以下是来自主PIMG的页面截图示例：
但是，当呼叫进入从TIMG时，该呼叫将由打开问候语应答。由于从TIMG发送到Unity Connection的邀请中没有“转接：”行，因此呼叫将转到开始问候语，以说明呼叫应转到哪个邮箱分机。
以下是在主设备上看到的呼叫信息示例：
08-28 17:54:28.078 [Si ] Prot 0D
08-28 17:54:28.078 [Si ] Prot 0A
08-28 17:54:28.078 [Si ] Prot 4D
08-28 17:54:28.078 [Si ] Prot 44
08-28 17:54:28.078 [Si ] Prot 30
08-28 17:54:28.078 [Si ] Prot 30
08-28 17:54:28.078 [Si ] Prot 30
08-28 17:54:28.078 [Si ] Prot 30
08-28 17:54:28.078 [Si ] Prot 30
08-28 17:54:28.078 [Si ] Prot 30
08-28 17:54:28.078 [Si ] Prot 31
08-28 17:54:28.078 [Si ] Prot 4E
08-28 17:54:28.078 [Si ] Prot 31
08-28 17:54:28.078 [Si ] Prot 39
08-28 17:54:28.078 [Si ] Prot 31
08-28 17:54:28.078 [Si ] Prot 38
08-28 17:54:28.078 [Si ] Prot 20
08-28 17:54:28.078 [Si ] Prot 39
08-28 17:54:28.078 [Si ] Prot 31
08-28 17:54:28.078 [Si ] Prot 39
08-28 17:54:28.078 [Si ] Prot 33
08-28 17:54:28.078 [Si ] Prot 33
08-28 17:54:28.078 [Si ] Prot 33
08-28 17:54:28.078 [Si ] Prot 33
08-28 17:54:28.078 [Si ] Prot 34
08-28 17:54:28.078 [Si ] Prot 38
08-28 17:54:28.078 [Si ] Prot 35
08-28 17:54:28.078 [Si ] Prot 20
08-28 17:54:28.078 [Si ] Prot 0D
08-28 17:54:28.078 [Si ] Prot 0A
08-28 17:54:28.078 [Si ] Code siSrvSerialInputEvent
08-28 17:54:28.078 [Si ] Prot From Serial: 0D 0A 4D 44 30 30 30 30 30 30 31
4E 31 39 31 38 20 39 31 39 33 33 33 33 34 38 35 20 0D 0A 19 00
08-28 17:54:28.078 [Si ] Prot 19
08-28 17:54:28.078 [Si ] Code siSrvPrcCpidFromSwitch ltn = 1,
src=9133333485, Dst = <NULL>, Redir = 1918, Reason = NoAns
08-28 17:54:28.078 [SiIp ] Code sertrans_ServerLocateClient 1
08-28 17:54:28.078 [SiIp ] Code sertrans_ServerLocateClient 1=client1
08-28 17:54:28.078 [SiIp ] Code _TaskMainClientReceive received data 516
08-28 17:54:28.078 [Si ] Code serial_client_cb
08-28 17:54:28.078 [Si ] Code SI_TYPE_CPID 1:NoAns (9193333485->->1918)
08-28 17:54:28.078 [Tel-1 ] Code GetChannelFromLogicalChannelNum
LogicalChanNum 0 span 0 channel 1
08-28 17:54:28.078 [Tel-1 ] Code t1casReportNewCpid
08-28 17:54:28.078 [Tel-1 ] Event Cpid (9193333485,->,->1918,) (NoAns)
08-28 17:54:28.078 [Tel-1 ] Warn t1casReportNewCpid err: no call for cpid
08-28 17:54:28.078 [Tel-1 ] Code t1casReportNewCpid saving pre-call cpid for
serial
08-28 17:54:29.195 [SiIp ] Code _TaskMainServerReceive(4) received 516 bytes
08-28 17:54:29.195 [SiIp ] Code _TaskMainServerReceive(4) keep-alive 1
received
08-28 17:54:29.195 [SiIp ] Code _TaskMainServerReceive(4) sending keep-alive
response
以下是从属设备上看到的问题邀请示例：
08-28 17:54:30.453 [VoIP ] Prot <----INVITE sip:Anonymous@14.48.4.88:5060 SIP/2.0
08-28 17:54:30.453 [VoIP ] Prot From:"Anonymous"<sip:Anonymous@14.48.4.92:5060;
user=phone>;vnd.pimg.port=1;tag=133B324631353641000BCF02
08-28 17:54:30.453 [VoIP ] Prot To:"Anonymous"<sip:Anonymous@14.48.4.88:5060>
08-28 17:54:30.453 [VoIP ] Prot Contact:<sip:14.48.4.92:5060>
08-28 17:54:30.453 [VoIP ] Prot Content-Type:application/sdp
08-28 17:54:30.453 [VoIP ] Prot Supported:replaces,early-session,100rel
08-28 17:54:30.453 [VoIP ] Prot Allow:INVITE,BYE,CANCEL,REFER,NOTIFY,OPTIONS,
REGISTER,INFO,ACK,PRACK
08-28 17:54:30.453 [VoIP ] Prot Expires:120
08-28 17:54:30.453 [VoIP ] Prot Call-ID:02061555D6F5009A000012BC@test.local
08-28 17:54:30.453 [VoIP ] Prot CSeq:1 INVITE
08-28 17:54:30.453 [VoIP ] Prot Max-Forwards:70
08-28 17:54:30.453 [VoIP ] Prot User-Agent:PBX-IP Media Gateway
08-28 17:54:30.453 [VoIP ] Prot Via:SIP/2.0/UDP 14.48.4.92:5060;
branch=z9hG4bKDC0A05314DD4ED48CEEEA72BD196FC38
08-28 17:54:30.453 [VoIP ] Prot Content-Length:245
这是因为呼叫信息通过串行电缆转发到主TIMG/PIMG，但逻辑终端号(LTN)信息与物理呼叫进入的T1中央身份验证服务(CAS)上的端口不匹配。
解决方案
在TIMG上，选择Configuration > Serial > Switch Protocol以配置每个端口的逻辑扩展号。
匹配TIMG LTN和PBX设置中的端口号。PBX有一个表，显示T1 CAS线路使用哪个LTN的信道。首先从PBX确定此信息，然后在TIMG中相应地设置。可以将LTN 1-24用于主信道1-24，将LTN 25-48用于从信道1-24。
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