Unity Connection 9.0(1) with SRSV in case of WAN Failover at Branch/Remote Site on SRE-910 Module

[Sumit Bhargava]

Hi,

I would like to understand if the below Scenario would work if we have Centralized Unity Connection 9.0(1) at HQ and Branch Site running Unity Connection9.0(1) on SRE-910 module for local VoiceMail Messaging during WAN Failover

SCENARIO- I:

HQ: Unity Connection (2-Servers in a Active/Active mode); Total Users in HQ= 5000

Branch/Remote Site: Cisco 3945 ISR; Total Users at Branch/Remote Site= 400

Branch/Remote Users (Qty 400) factored with Enhanced Unity Connection 9.0(1) license

All Users (HQ + Branch/Remote) registered with Centralized Unity Connection 9.0(1) at HQ

We understand as per the OVA Template Sizing for SRE-910 running Unity Connection 9.0(1), can support only 100 voicemail only users

Since, at the Branch/Remote Site there are 400 users for whom, SRSV is to be provisioned in case of WAN failover and Cisco 3945 ISR comes with 4-SM slots, so can we factor four quantities of  SM-SRE-910-APP-K9.

i.e; Branch/Remote Site with 400 Users to be provisioned with SRSV on Cisco 3945 ISR, need to factor

      (1.)  SM-SRE-910-APP-K9 ; 100 voicemail only users

      (2.)  SM-SRE-910-APP-K9 ; 100 voicemail only users

      (3.)  SM-SRE-910-APP-K9 ; 100 voicemail only users

      (4.)  SM-SRE-910-APP-K9 ; 100 voicemail only users

  This way incase of WAN failover, all the 400 users at Branch/Remote Site will get local VoiceMail only functionality through Cisco 3945 ISR running SRE-910 (Qty 4)

Ques.1  Please advice if in the above Scenario-I, Unity Connection9.0(1) SRSV understanding(in case of WAN failoover) is correct for Branch/Remote users?

Ques.2 Will the Branch/Remote users get registered  to local Unity Connection9.0(1) on SRE-910 automatically , if Yes, then how?

Ques3. Does each UCS E140S / E140D/ 140DP/ 160D/ 160DP supports only 100 Voicemail users only?

Thanks

Sumit

[Jonathan Schulenberg]

1. No. First, you cannot band multiple SRSV instances together to aggregate capacity. The bridge (a dial-peer) between CME/SRST and the SRSV module would not be able to route calls to the correct SRSV instance. The 100 mailbox limit is not permanent limit, only what Cisco had time to test/certify for the initial release. I suggest speaking with your Cisco AM/SE to discuss your scaling requirements and how/when SRSV will meet them.
2. The phone fails over to CME/SRST which has a voicemail configuration to set CFNA/CFB destinations as well as the voicemail button destination.
3. Only the 910 has been tested at this point. There is no reason why the larger SREs wouldn't work; Cisco just hasn't ceritifed them.

Also, SRSV requires CXN 9.1.x, not 9.0.x.

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