voice gateway

Mary · ‎05-12-2017

we have around 100 cisco ip phones, among them, around 20 ip-phones got de-registering after user relog in to windows, i have only access to switch and voice gateway, but no access to cucm.

I know the ip phone's ip address and ip phone mac address and name, how to identify the root cause?

Report Inappropriate Content · ‎05-12-2017

what type of signalling protocol are you running in the voice gateway is it MGCP, H323 or SIP ?

2nd question can the user manually log into the phone again after they are being logged out ?

romahaja · ‎05-15-2017

Here is the complete guide to collect a packet capture :

https://supportforums.cisco.com/document/44741/collecting-packet-capture-cisco-ip-phone

Chris Deren · ‎05-13-2017

Browse the IP address of the phone and review the console logs for what happened during the time the phone unregisters.

Manish Gogna · ‎05-15-2017

Since you do not have access to cucm you can take a packet capture from an IP phone and filter the output with the Ip addr of the phone and cycm server to which the phone registers and check for any issues with signaling ( Skinny or SIP ) and keepalives/acks between cucm and IP phone.

You can also check the underlying network ( switches/routers/firewalls ) for any packet drops or ports that may be blocked.

You can find info on how to take packet captures and the port usage on cucm by a simple google search.

HTH

Manish

saif musa · ‎05-15-2017

Hi,

How did you figure out that there is CUCM? it could be CME router. Also, did all 100 ip phone including 20 devices that have deregistering issue configured with the same call control server (CME or CUCM )?