Cisco Cisco TelePresence Video Communication Server Expressway
Appendix 1 – Troubleshooting
Cisco VCS Deployment Guide: Microsoft OCS 2007 R2, Lync 2010 and Cisco VCS X7.1
Page 79 of 104
Call to PSTN (via OCS/Lync PSTN gateway) or other
devices requiring caller to be authorized fails with 404
not found
devices requiring caller to be authorized fails with 404
not found
In Some OCS/Lync configurations, especially where OCS/Lync PSTN gateways are used, calls are
only allowed if the calling party is authorized. This actually means that the calling party’s domain must
be the OCS/Lync server shared domain.
only allowed if the calling party is authorized. This actually means that the calling party’s domain must
be the OCS/Lync server shared domain.
For calls from endpoints that are not part of a FindMe this means that the endpoints must register to
the video network with a domain that is the same as the OCS/Lync domain.
the video network with a domain that is the same as the OCS/Lync domain.
For calls from endpoints that are part of a FindMe the endpoints can register with any domain so long
as the FindMe ID has the same domain as the shared OCS/Lync domain and in the FindMe
configuration Caller ID is set to FindMe ID (instead of Incoming ID).
as the FindMe ID has the same domain as the shared OCS/Lync domain and in the FindMe
configuration Caller ID is set to FindMe ID (instead of Incoming ID).
MOC/Lync clients try to register with VCS Expressway
SIP video endpoints usually use DNS SRV records:
_sips._tcp.<domain>
_sip._tcp.<domain> and
_sip._udp.<domain>
in that order to route calls to Cisco VCS.
MOC/Lync clients use:
_sipinternaltls._tcp.<domain>
- for internal TLS connections
_sipinternal._tcp. <domain>
- for internal TCP connections (only if TCP is allowed)
_sip._tls. <domain>
- for external TLS connections
_sip._tcp.<domain>
- for external TCP connections (MOC R1 only)
_sip._tcp.<domain> is common to both when MOC R1 is used on an external network. From R2
MOC/Lync clients only support TLS connection to the Edge Server. The _sip._tcp.<domain> DNS
SRV record should be used for the Cisco VCS Expressway.
MOC/Lync clients only support TLS connection to the Edge Server. The _sip._tcp.<domain> DNS
SRV record should be used for the Cisco VCS Expressway.
B2BUA problems
B2BUA registration problems users fail to register
If B2BUA registration fails to register FindMe users (Registration status = failed), check:
1. The FindMe name is correctly entered into Active Directory.
2. A MOC/Lync client can register as the FindMe name – you need to login first from a MOC/Lync
client before the B2BUA can properly control the OCS/Lync user.
OCS/Lync problems
As a starting point
for OCS: running the OCS ‘Best Practices Analyzer’ will help identify configurations that may be
incorrect on OCS. Details and the download can be found at:
incorrect on OCS. Details and the download can be found at:
for Lync: running the Lync Server 2010 ‘Best Practices Analyzer’ will help identify configurations
that may be incorrect on Lync Server. Details and the download can be found at:
that may be incorrect on Lync Server. Details and the download can be found at: