[SFTF] Help Me

[vinay singh <vinay.er@xxxxxxxxx>]

hello all...

in the  RFC3261 i  am not getting a word Expiration Interval at
10.2.1.1 plese discribe it.

Setting the Expiration Interval of Contact Addresses

There are two ways :-
1. through an Expires header field or an "expires" Contact header parameter
2.an expiration interval for all Contact header field values that do
not contain the "expires" parameter.

Please explane it.

thanks in advance........

vinay kumar singh