7940G SIP to send keepalive/SIP Options

[CODNetadmin]

Hi Guys!

Is there any way for the SIP 7940G to send SIP Option message or keepalives?

Setup is 7940g <-->NAT <--> PBX

As checked,it only sends REGISTER message every 1 hour, and no SIP OPTION or keepalive which we suspect the reason why the connection drops.

Thanks!

[Maren Mahoney]

I assume you are running the 7.5 firmware which is the latest. Here is a link to that version's compliance with RFC 3261 which shows that it will respond to OPTIONS only. I don't see mention of keepalives in the entire guide, which leads me to believe that it will not send those either.

Cisco SIP IP Administrator Guide, Version 7.5 - Compliance with RFC 3261

You may be able to change the REGISTER timer on the CLI of the phone:

# Phone Registration Expiration [1-3932100 sec] (Default - 3600)
timer_register_expires: 3600

You posted this question in another message board where you said the phone was in a non-CUCM environment. What do you have the phone registered to?