Version 5.8
531
October 2009
SIP User's Manual
9. IP Telephony Capabilities
5.
Next, the par called A2 needs to be evaluated:
•
The method type is ‘REGISTER’.
•
Using SIP protocol ‘sip’.
•
Proxy IP from
ini
file is ‘10.2.2.222’.
•
The equation to be evaluated is
‘REGISTER:sip:10.2.2.222’.
•
The MD5 algorithm is run on this equation and stored for future usage.
•
The result is ’a9a031cfddcb10d91c8e7b4926086f7e’.
6.
Final stage:
•
The A1 result: The nonce from the proxy response is
‘11432d6bce58ddf02e3b5e1c77c010d2’.
•
The A2 result: The equation to be evaluated is
‘A1:11432d6bce58ddf02e3b5e1c77c010d2:A2’.
•
The MD5 algorithm is run on this equation. The outcome of the calculation is the
response needed by the device to register with the Proxy.
•
The response is ‘b9c45d0234a5abf5ddf5c704029b38cf’.
At this time, a new REGISTER request is issued with the following response:
REGISTER sip:10.2.2.222 SIP/2.0
Via: SIP/2.0/UDP 10.1.1.200
From: <sip: [email protected]>;tag=1c23940
To: <sip: [email protected]>
Call-ID: [email protected]
Server: Audiocodes-Sip-Gateway/MP-500 MSBG/v.5.40.010.006
CSeq: 1 REGISTER
Contact: sip:[email protected]:
Expires:3600
Authorization: Digest, username: 122,
realm="audiocodes.com”,
nonce="11432d6bce58ddf02e3b5e1c77c010d2",
uri=”10.2.2.222”,
response=“b9c45d0234a5abf5ddf5c704029b38cf”
7.
Upon receiving this request and 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: [email protected]>;tag=1c23940
To: <sip: [email protected]>
Call-ID: [email protected]
Cseq: 1 REGISTER
Date: Thu, 26 Jul 2001 09:34:42 GMT
Server: Columbia-SIP-Server/1.17
Content-Length: 0
Contact: <sip:[email protected]>; expires="Thu, 26 Jul 2001 10:34:42
GMT"; action=proxy; q=1.00
Contact: <[email protected]:>; expires="Tue, 19 Jan 2038 03:14:07
GMT"; action=proxy; q=0.00
Expires: Thu, 26 Jul 2001 10:34:42 GMT
Summary of Contents for mediapack MP-500
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Page 22: ...SIP User s Manual 22 Document LTRT 12801 MP 500 MSBG Reader s Notes...
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Page 573: ...Version 5 8 573 October 2009 SIP User s Manual 13 Technical Specifications Reader s Notes...
Page 574: ...User s Manual Version 5 8 www audiocodes com...