sipping-13----Page:4
1  2  3  4  5 

Core recommendations
User MAY choose same user name across URIs within same domain
or stronger: Provider SHOULD assign same user part across URI schemes
Providers SHOULD NOT assign the same user id in different URI schemes to different people
SIP URIs SHOULD have a working email equivalent
motivation less clear (not necessary for voicemail)
useful for initial sign-up in some scenarios
PPT Version