Nortel Networks TP-1610 SIP REGISTERsip10.2.2.222, A111432d6bce58ddf02e3b5e1c77c010d2A2

Mediant 2000 SIP User’s Manual 8. Gateway Capabilities Description

Using SIP protocol “sip”

Proxy IP from ini file “10.2.2.222”

The equation to be evaluated:

“REGISTER:sip:10.2.2.222”.

The MD5 algorithm is run on this equation and stored for future usage.

The result is:”a9a031cfddcb10d91c8e7b4926086f7e”

The final stage:

The A1 result

The nonce from the proxy response: “11432d6bce58ddf02e3b5e1c77c010d2”

The A2 result

The equation to be evaluated:

“A1:11432d6bce58ddf02e3b5e1c77c010d2:A2”.

The MD5 algorithm is run on this equation. The outcome of the calculation is the response needed by the gateway to be able top register with the Proxy.

The response is: “b9c45d0234a5abf5ddf5c704029b38cf”

At this time a new REGISTER request is issued with the response:

REGISTER sip:10.2.2.222 SIP/2.0 Via: SIP/2.0/UDP 10.1.1.200

From: <sip: 122@10.1.1.200>;tag=1c23940

To: <sip: 122@10.1.1.200>

Call-ID: 654982194@10.1.1.200

Server: Audiocodes-Sip-Gateway/TrunkPack 1610/v.4.20.299.412

CSeq: 1 REGISTER

Contact: sip:122@10.1.1.200: Expires:3600

Authorization: Digest, Username: MP108-AudioCodes, realm="audiocodes.com”, nonce="11432d6bce58ddf02e3b5e1c77c010d2", uri=”10.2.2.222”,

response=“ b9c45d0234a5abf5ddf5c704029b38cf”

On receiving this request, if accepted by the Proxy, the proxy returns a 200 OK response closing the REGISTER transaction.

SIP/2.0 200 OK

Via: SIP/2.0/UDP 10.1.1.200

From: <sip: 122@10.1.1.200>;tag=1c23940

To: <sip: 122@10.1.1.200>

Call-ID: 654982194@10.1.1.200

Cseq: 1 REGISTER

Date: Thu, 26 Jul 2001 09:34:42 GMT

Server: Columbia-SIP-Server/1.17

Content-Length: 0

Contact: <sip:122@10.1.1.200>; expires="Thu, 26 Jul 2001 10:34:42 GMT"; action=proxy; q=1.00

Contact: <122@10.1.1.200:>; expires="Tue, 19 Jan 2038 03:14:07 GMT"; action=proxy; q=0.00

Expires: Thu, 26 Jul 2001 10:34:42 GMT

Version 4.4 157 July 2005