SIP Date header value

[Grant Bagdasarian]

Hello,

Where does the value set in the Date header of a SIP message come from?

For some reason the time is always 2 hours behind.

These are my time settings:

clock timezone GMT 1 0

clock summer-time GMT recurring last Sun Mar 2:00 last Sun Oct 2:00

ntp server 192.168.1.89

Show clock does show the correct time.

15:34:18.006 GMT Thu Aug 23 2012

Anyone have an idea how to set the Date header to the correct time?

Kind regards,

Grant

[Ayodeji Okanlawon]

Is this a cisco Gateway? My sip message date/timing is consistent with the time on the gateway..The timestamp should reflect the time of the gateway.

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"'Nature is too thin a screen, the glory of the omnipresent God bursts through it everywhere"-Ralph Waldo Emerson

[brmeade]

The Date header is going to be set by whatever originated the SIP traffic.  This will likely not change on a hop-by-hop basis.

[Grant Bagdasarian]

Yes, this is a Cisco Gateway. We're using two 3925. When the calls are originated by us, the timestamp is still 2 hours behind which I find weird. When receiving requests from our SIP provider there is no Date header present in the initial INVITE. When we send the 100 Trying back, that's when a Date header is added.

[Grant Bagdasarian]

I believe it is a timezone issue. I've changed the timezone to

clock timezone CET 1 0

clock summer-time CET recurring last Sun Mar 2:00 last Sun Oct 2:00

But the Date header still shows GMT. Performed a reload, but without any change to the Date header timezone value

[brmeade]

What's originating the call?  An IP Phone?  Does it go through CUCM or is this CME?  Is the IP phone SIP or SCCP?

[Grant Bagdasarian]

For incoming SIP, the originator is our SIP provider.

For outgoing SIP, the originator is a TCL script which calls a certain destination.

[brmeade]

It may be an issue with how the TCL script is pulling the date value.  I don't know anything about TCL though, so I won't be able to help you with that.

[Grant Bagdasarian]

Alright. No problem. Thanks for the help anyways.

I'll ask on the developers forum.