iPECS UCP
Feature Description and Operation Manual Issue 1.3
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8.3 SIP Virtual Mobile Extension
Description
Virtual Mobile Extension (VMEX) is a proprietary regional FMC (Fixed Mobile Convergence)
implementation, which combines mobile service with SIP Call services and the iPECS UCP
system functionality. Calls from the VMEX are directed from the Mobile Switching office to the
carrier’s SIP Call server and delivered to the iPECS UCP for routing. The iPECS UCP routes
the call internally or externally or activates a feature based on the digits received in the SIP
“Invite” message.
When the iPECS UCP receives a call for the VMEX, the call is directed to the VMEX over a
SIP trunk to the carrier’s SIP Call server, which routes the call to the Mobile switching office
to the VMEX. Support for SIP Subscribe and Notify provide status updates to other devices
within the iPECS UCP.
Operation
System
Conditions
Operation of VMEX is automatic when configured.
1. VMEX service is regional specific and functions only where the carrier service is
implemented in accordance with the iPECS UCP functionality.
2. The VMEX station must be virtually registered as a VMEX SIP station and employs
SIP for signaling.
3. A VoIP channel is required to support proper operation of the VMEX as with any
SIP Extension.
Programming
SYSTEM ID &