User's Manual

Source-based routing 65

Figure 11

Registration process

Source-based routing

When registered to a CS 1000 NRS-SPS, the MCC 3100 for Windows

Mobile Dual Mode uses the source-based routing feature of the CS 1000

NRS-SPS

Calls made from the MCC 3100 travel to the CS 1000 NRS-SPS and

trigger the SBR feature with the tag x-nt-feature=x-nt-home, which is in

the request URI of the INVITE sent from the MCC 3100. Rather than

routing based on the Request-URI, the SPS routes the call based on the

p-asserted-identity (PAI) tag within the INVITE. This method allows the

SPS to route the call to the MCC 3100 Windows Mobile users home Call

Server. The home Call Server then routes the call based on the TO field

included in the original INVITE.

Nortel Mobile Communication 3100 Series Portfolio

Nortel Mobile Communication Client 3100 for Windows Mobile Dual Mode Administration

NN42030-601 02.01 Standard

9 May 2008