Cisco Linksys SPA9000 - Manual (Page 108)

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Linksys SPA9000 Administrator Guide
Document Version 3.01
Chapter 4 Configuring SPA9000 Features
Managing Call Forwarding
• When the call forward destination is “vm,” the SPA9000 forwards the call to the URL specified in
<Mailbox Deposit URL>.
Following is an example where the station at extension 5034 forwarded the external caller to an external
number 37683104 (the line interface dial plan strips the leading 9):
• Client station replies 302 to SPA9000 (Line 2 private side)
SIP/2.0 302 Moved Temporarily
To: <sip:[email protected]:6060>;tag=e7d2be737eb6d185i0
From: External Caller <sip:[email protected]>;tag=8eb8e35678762306o3
Call-ID: [email protected]: 101 INVITE
Via: SIP/2.0/UDP 192.168.0.1:6060;branch=z9hG4bK-923a6716
Contact: <sip:[email protected]:6060>
Diversion: “User-C” <sip:[email protected]:6060>;reason=unconditional
Server: Sipura/SPA841-3.1.4(a0714sec)
Content-Length: 0
• SPA9000 (Line 2 Public Side) Replies 200 to External Caller followed by REFER:
SIP/2.0 200 OK
To: <sip:[email protected]>;tag=b47365fa7b1ae0b6i3;ref=5034
From: External Caller <sip:[email protected]>;tag=156b2582302c90cao0
Call-ID: [email protected]
CSeq: 102 INVITE
Via: SIP/2.0/UDP matrix.sipura.com:5060;branch=f87169c5-5dd80aa8-a55271cf-e6750b2d-1
Via: SIP/2.0/UDP 192.168.2.228:5060;received=192.168.2.228;branch=z9hG4bK-ef32c1f0
Contact: PBX Line 2 <sip:[email protected]:5061>
Content-Length: 103
Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER
Supported: x-sipura
Content-Type: application/sdp
v=0
o=- 74 166 IN IP4 192.168.0.1
s=-
c=IN IP4 0.0.0.0
t=0 0
m=audio 12345 RTP/AVP 0
a=sendonly
...
REFER sip:[email protected]:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.2.205:5061;branch=z9hG4bK-50d452e
From: <sip:[email protected]>;tag=b47365fa7b1ae0b6i3;ref=5034
To: External Caller <sip:[email protected]>;tag=156b2582302c90cao0
Referred-By: PBX Line 2 <sip:[email protected]>;ref=5034
Call-ID: [email protected]
CSeq: 101 REFER
Max-Forwards: 70
Contact: PBX Line 2 <sip:[email protected]:5061>
Refer-To: <sip:[email protected]>
Content-Length: 0
...
When an incoming call from the ITSP is forked to multiple client stations, the SPA9000 does not honor
the 3xx response returned by any of the client stations. If you wish the call to be forwarded to voicemail
or another client station when it is not picked up, you can specify the optional “cfwd=target” syntax in
<Contact List> so that the call is forwarded to the target number if not answered.