Dialing and numbering plan issues for the mixed network 33
— Local numbers
— National numbers
— International numbers
— Special numbers
•Private address space — which is subdivided into the following
categories:
— Level 0 regional numbers (in CS 1000, these are known as
Coordinated Dialing Plan [CDP] numbers)
— Level1 regional numbers(in CS 1000, these are known as Universal
Dialing Plan [UDP] numbers)
Tobe useful, a DN must be scoped within an appropriateaddress space.
One way of achieving this is by qualifying DNs.
Both CS 1000 and MCS 5100 systems have implemented a phone-context
parameter of the userinfo-field of the telephony-based SIP URI as a means
to fully qualify a DN.
•A SIP URI with the user=phone-context parameter is known as
a telephony-based SIP URI. For more information, see Appendix
"Parameter configuration fora SIP URI" (page103).
•A SIP URI without the user=phone-context parameter is known as a
non-telephony-based SIP URI or a regular SIP URI.
The format of a telephony-based SIP URI is as follows:
sip:[directorynumber];phone-context=[phonecontext]@[domainame];
user=phone
sip:+[directorynumber]@[domainname];user=phone (for international
PSTN numbers)
The format of a regular SIP URI is as follows:
sip:[username]@[domainame]
ATTENTION
Rule 4: In a mixed CS 1000/MCS 5100 network, all DNs passed between the two
systems must be in the form of a telephony-based SIP URI.
If Rule 4 is not followed,a CDP DN may be incorrectly interpreted as a UDP
number or a public/local number as a UDP number.
Nortel Communication Server 1000
Communication Server 1000 to MCS 5100 ConvergedDesktop Type 2 Configuration Guide
NN43001-321 01.05 Standard
Release 5.0 15 February 2008
Copyright© 2005-2008, Nor tel Networks
.