B2B Calls to Webex Room is not working

[shihab.kp]

Hi all

Till Yesterday all are working fine

today we have faced issue on Cisco Telepresence SX 10 Device AND Polycom devices

when we trying to make a B2B call to my webex personal room, the call is not happening.But we can make b2b calls to microsoft teams room at that time all working fine.

Bridge calls are also working fine

The issue is we cant make B2 calls to external Webex personal room.

in Expressway E it showing

State	Connection Failed
Start time	2021-11-18 16:15:35
End time	2021-11-18 16:15:35
Duration	0 seconds
Tag	6130cfb7-a88b-4b2d-b787-1800d31940ad
Serial number	a5bd121d-9708-4b1a-a9a6-469f7ce0d480
Type	Video
SIP variant	Standards-based

Bandwidth node	B2B Server
Source alias 1	sip:19551@ixxxxxx (Url)
Target alias 1	sip:shihxxxx@xxxxxx.webex.com (Url)
Protocol	SIP
Address	10.1.36.22:27170
Transport	TCP
Encryption type	None
Reason	Temporarily Not Available
Cause	480

Polycom devices also faced issue but they are working fine with both h323 and sip

Thanks in Advance

[b.winter]

Have you taken logs of the call and tried to analyze it with the "Collaboration Solutions Analyzer" (https://cway.cisco.com/csa/)?

[Nithin Eluvathingal]

The first step will be, collecting logs from both expressway C& E and as @b.winter mentioned analyse it using CSA tool. You will have more insight to your problem. 

How to collect logs from expressway, Refer below links 

https://www.cisco.com/c/en/us/support/docs/unified-communications/expressway/213360-collect-expressway-vcs-diagnostic-log-fo.html

https://video.cisco.com/video/5810050375001