[asterisk-users] Call going into s-extension

[Kevin P. Fleming]

On 12/27/2011 01:51 PM, Jonas Kellens wrote:
> On 12/27/2011 08:45 PM, Kevin P. Fleming wrote:
>> On 12/27/2011 01:43 PM, Jonas Kellens wrote:
>>> Hello list,
>>>
>>> any idea why this call goes to the extension 3292000101 :
>>>
>>> /INVITE sip:3292000101 at IP.IP.IP.IP:5060 SIP/2.0
>>> Call-ID: OTRC74RLS5C2PBYULB3HSJZBR4 at IP.IP.IP.IP
>>> CSeq: 102 INVITE
>>> From: "32433885116" <sip:32433885116 at IP.IP.IP.IP>;tag=74706
>>> Via: SIP/2.0/UDP
>>> IP.IP.IP.IP:5060;rport;branch=z9hG4bKcc90522a02bb6591fd8a807e66
>>> Via: SIP/2.0/UDP
>>> IP.IP.IP.IP:5060;branch=z9hG4bKd636e00c235e59dbb2d4a5eff83fdd96
>>> Max-Forwards: 68
>>> Content-Type: application/sdp
>>> Contact: <sip:32433885116 at IP.IP.IP.IP:5060;transport=udp>
>>> User-agent: Vox Callcontrol
>>> To: <sip:3292000101 at IP.IP.IP.IP>
>>> Content-Length: 309
>>> Record-Route: <sip:IP.IP.IP.IP:5060;lr>/
>>>
>>>
>>> and this call goes to the s-extension :
>>>
>>> /<--- SIP read from UDP:IP.IP.IP.IP:5060 --->
>>> INVITE sip:s at IP.IP.IP.IP:5060 SIP/2.0
>>> Record-Route: <sip:IP.IP.IP.IP;lr;ftag=as6aa259f4;did=949.96eeed57>
>>> Via: SIP/2.0/UDP IP.IP.IP.IP;branch=z9hG4bK918e.b1b09812.0
>>> Via: SIP/2.0/UDP
>>> 217.111.202.80:5060;received=217.111.202.80;branch=z9hG4bK5cb88830;rport=5060
>>>
>>> Max-Forwards: 69
>>> From: "32433885116" <sip:32433885116 at 217.111.202.80>;tag=as6aa259f4
>>> To: <sip:3292000101 at IP.IP.IP.IP>
>>> Contact: <sip:32433885116 at 217.111.202.80:5060>
>>> Call-ID: 092fd61b1e3aad5e670dfa94578db96d at 217.111.202.80:5060
>>> CSeq: 102 INVITE
>>> User-Agent: TLDOSIPS
>>> Date: Tue, 27 Dec 2011 19:26:35 GMT
>>> Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY,
>>> INFO, PUBLISH
>>> Supported: replaces, timer
>>> Content-Type: application/sdp
>>> Content-Length: 296/
>>>
>>>
>>> What is the difference ??
>>
>> Did you look at the Request-URIs specified in the INVITE lines at the
>> beginning of the SIP messages? One specifies 's' as the target, the
>> other specifies '3292000101'.
>
> Yes I saw these... why is there a difference ?

You'd have to ask the devices that generated them. We aren't all-knowing 
and all-seeing. They are also different in quite a few other ways, 
including User-Agent, supported request methods, SIP extensions and others.

-- 
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: kfleming at digium.com | SIP: kpfleming at digium.com | Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at www.digium.com & www.asterisk.org