
It looks like Cisco is phasing out the original Cisco Unity Express Network Module and Unity Express Network Module Enhanced Capacity.
The only option to purchase in this form factor now is

Lets say you have 4 offices each with a UC520 or ISR running Unity Express.

Saurabh V a TME at Cisco gave me the following information regarding the new IP phone models.<

Cisco has released two New IP Phone Expansion modules the 7915 and 7916.
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Finally, some much needed updates to the UC500 licensing model.
NEW, 24User UC520:
- UC520-24U-8FXO-K9, List price is $8,995.
- Orderability begins February 8th.


Smith on VOIP has a good review of it Here.
Some of the features not mentioned in the review, but worth mentioning here are:
Cisco's Data Sheet for it is located here.


Question: what looks like a UC500 but isn't?
Answer:

CIsco has made a CHEAP phone. Ok, not cheap lets use the word inexpensive.

The Cisco Unified SIP Phone 3911 is a SIP only single line phone. Most likely good for lobbies and medium use installs. It will work with Call Manager Express and the UC500 series. You just have to know how to configure SIP phones on

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