[Asterisk-Users] Changing User-Agent: Asterisk PBX

[ChB]

Hello Folks!

in my sip-logs i see that asterisk uses the User-Agent ID "Asterisk
PBX":

SipClient: Received: 16:34:03.023
---------------------------------
BYE sip:102141 at 131.130.XXX.XXX:44343;transport=udp SIP/2.0
Max-Forwards: 10
Record-Route: <sip:213.2XX.XXX.XX8;ftag=as2eb3c466;lr=on>
Via: SIP/2.0/UDP 213.2XX.XXX.XX8;branch=z9hG4bK539a.47e6e8a7.0  #this is SER 
Via: SIP/2.0/UDP 213.2XX.XXX.XX7:5060;branch=z9hG4bK300d4e2b;rport=5060 # this is Asterisk 
From: "012341234"<sip:012341234 at 213.208.XXX.XX7>;tag=as2eb3c466 
To: <sip:1234 at 213.2XX.XXX.XX7>;tag=7E24716A 
Contact: <sip:012341234 at 213.2XX.XXX.XX7> 
Call-ID: 4fbd8b620170cb7a5b0e6e6037df07d0 at 213.2XX.XXX.XX7 
CSeq: 103 BYE
User-Agent: Asterisk PBX 
Content-Length: 0
Route: <sip:1234 at 131.130.XXX.XXX:44343;transport=udp>

this is an example from an incoming sip-call to a geographic number
with a matching extension dialing the sip-account 1234. I'd like to
customize this and thought activating the "useragent="-setting in the
sip.conf would change the display, but it doesn't seem to have any
effect. is this the right place to change this distinct entry or do i
have to edit it in the source?
Asterisk-Version is 1.0.9

Thanks
Christian