[SIPForum-discussion] clarification on contact header

[Andrew Yu]

Dear members,

I'm some difficulties on understanding the purpose of the contact 
header. Please advice what role does it play and how it is different 
when compared with the FROM header? and why is that contact header is 
not mandatory in all SIP requests as described in 8.1.1 RFC3261. Thank you.

-- 
Cheers,

Asiatel Singapore Pte Ltd
Andrew Yu

19 Jalan Kilang Barat
#06-01, Acetech Centre
Singapore 159361

Tel: +65 6271 8233
Fax: +65 6274 4266