09049051 is referenced by 8 patents and cites 13 patents.

Techniques to access messaging services for branch offices are described. In one embodiment, for example, an apparatus may include a network interface for a packet-switched network, a private branch exchange for a circuit-switched network, and a gateway to couple to the network interface and the private branch exchange. The gateway may be operative to establish a packet-switched call connection with the network interface and a circuit-switched call connection with the private branch exchange. The gateway may further include a call router to route a call request over a circuit-switched network with the private branch exchange on behalf of a call terminal to access messaging services from a data center with a messaging server when the call terminal and the network interface are unavailable. Other embodiments are described and claimed.

Title
Techniques to access messaging services for branch offices
Application Number
11/973737
Publication Number
9049051 (B2)
Application Date
October 10, 2007
Publication Date
June 2, 2015
Inventor
Michael Wilson
Sammamish
WA, US
Cliff Didcock
Sammamish
WA, US
Agent
Micky Minhas
Peter Taylor
Louise Bowman
Assignee
MICROSOFT TECHNOLOGY LICENSING
WA, US
IPC
H04M 7/00
H04M 3/533
H04L 12/58
H04L 12/54
H04L 12/66
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