Cisco Systems SPA9000 manual Content-Type application/dialog-info+xml ?xml version=1.0?

Chapter 4 Configuring SPA9000 Features

Managing Call Forwarding

Max-Forwards: 70

Contact: “User-A” <sip:5041@192.168.0.4:5061>Event: dialog Content-Length: 408

Content-Type: application/dialog-info+xml <?xml version=”1.0”?>

<dialog-info xmlns=”urn:ietf:params:xml:ns:dialog-info” version=”0” state=”partial” entity=”sip:5031@192.168.0.1:6060”>

<dialog id=”201” direction=”initiator”> <local>

<identity display=”User-A”>sip:5031@192.168.0.1:6060</identity> <target uri=”sip:5031@192.168.0.1:6060”>

<param pname=”x-line-id” pvalue=”0”/> </target>

</local>

<state>trying</state>

</dialog> </dialog-info>

2.The SPA9000 grants the line seize request by replying 202 (because no one else is using that line key):

SIP/2.0 202 Accepted

To: “User-A” <sip:5041@192.168.0.1:6060>;tag=41a7-0

From: “User-A” <sip:5031@192.168.0.1:6060>;tag=e676b37bae382029o1

Call-ID: 942395ba-dfdc1193@192.168.0.4

CSeq: 6583 NOTIFY

Via: SIP/2.0/UDP 192.168.0.4:5061;branch=z9hG4bK-55f99f8e

Server: Sipura/SPA2100-3.1.5(a)

Content-Length: 0

3.The SPA9000 notifies other client stations sharing the line key on the shared extension:

NOTIFY sip:5041@192.168.0.6:5060 SIP/2.0

Via: SIP/2.0/UDP 192.168.0.1:6060;branch=z9hG4bK-1cae6e99

From: PBX Line 1 <sip:37683101@matrix.sipura.com>;tag=5080117180da6835o2

To: <sip:5041@192.168.0.6:5060>

Call-ID: 3ecb02c9-250f41cd@localhost

CSeq: 56195 NOTIFYMax-Forwards: 70Event: dialog

Content-Length: 397

Content-Type: application/dialog-info+xml

<?xml version=”1.0”?>

<dialog-info xmlns=”urn:ietf:params:xml:ns:dialog-info” version=”31” state=”partial” entity=”sa@192.168.0.1:6060”> <dialog id=”201” direction=”initiator”>

<local>

<identity display=”User-A”>sip:5031@192.168.0.1:6060</identity> <target uri=”sip:5031@192.168.0.1:6060”>

<param pname=”x-line-id” pvalue=”0”/> </target>

</local>

<state>trying</state>

</dialog> </dialog-info>

When a client station sends the initial NOTIFY to the SPA9000, all the line key resources allocated to this station, if any, are released immediately to avoid locking up of line keys because of client reboot. The same is done when the registration of the client station expires.

Note that the SPA9000 assumes all partial-state dialog-info and contains only one dialog.

	Linksys SPA9000 Administrator Guide
4-24	Document Version 3.01