Hi Daniel,

The INVITE contains maddr=10.150.152.102 and hope server can do multicasting to several phones to achieve paging functionality:

INVITE sip:9621@10.150.152.102:5060;transport=udp;maddr=10.150.152.102 SIP/2.0^M

Via: SIP/2.0/UDP 10.150.151.38:5060;branch=z9hG4bK042e71c1c3819bf6b^M

Max-Forwards: 70^M

From: Phone_1 sip:19725509623@10.150.152.102;tag=fdd5d85838;epid=SC27fd6e^M

To: sip:9621@10.150.152.102:5060;transport=udp;tag=SEC11-a96960a-1e9b960a- 1-0174t58y1o62^M

Call-ID: 466658c69bd278b0^M

CSeq: 2 INVITE^M

Contact: Phone_1 sip:19725509623@10.150.151.38:5060;transport=udp^M

Min-SE: 90^M

Supported: timer, replaces, 100rel^M

User-Agent: optiPoint 420 Advance/V7 V7 R5.3.0^M

X-Control4-Call-Type: ST-insecure^M

Content-Type: application/sdp^M

Regards,

Ming

From: Daniel-Constantin Mierla [mailto:miconda@gmail.com] Sent: Friday, March 25, 2011 12:57 AM To: SIP Router - Kamailio (OpenSER) and SIP Express Router (SER) - Users Mailing List Cc: Ming Liu Subject: Re: [SR-Users] any one use multicast for paging ?

Hello,

On 3/24/11 3:21 PM, Ming Liu wrote:

Hi,

Need help on paging case.

The via header has maddr field contains multicast ip address, how does this configure ?

can you paste here such INVITE? I am not really understanding from your message what exactly you are looking for, maybe you can give a bit more details about what you expect to happen.

Cheers, Daniel

And how does sip proxy server react ?

Advice would be appreciated.

Ming

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