[cisco-voip] pros, cons, and recommendations

[Lelio Fulgenzi]

I think the vendors should be able to provide you with reasons of going with one over the other. Let them do the work is what I say. ;)

That being said, with respect to the servers, the Cisco site has plenty of information on hardware content as well as the total number of phones supported per server. It all depends on your comfort level with the availability and serviceability of the servers. For example, the 7825 doesn't have dual/removable power supplies.

As for the gateways, you have to look at functionality here. MGCP vs H323 (or at least that's what I hear ;) and configuration. We use the old 6608s for T1 connectivity as well as conferencing and I love them. But we lose out on some of the feature sets like VXML and some of the fancy Tk/tcl things that people can do on routers. If you already have the 6500s, I would say get the CMMs.

Lelio



--------------------------------------------------------------------------------
Lelio Fulgenzi, B.A.
Network Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
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  ----- Original Message ----- 
  From: Brown, Matthew A. 
  To: cisco-voip at puck.nether.net 
  Sent: Thursday, May 11, 2006 2:48 PM
  Subject: [cisco-voip] pros, cons, and recommendations


  My organization is preparing to move from a traditional PBX to a Cisco
  IPC system and has been given contradicting recommendations for certain
  equipment by different potential vendors.  What are your pros, cons, and
  recommendations for these pieces:

  Gateway between internal network and PSTN:
  2 Cat6500 Communications Media Modules (installed in separate core
  6500s) w/ 6-port T1 adapter
  vs.
  2 3845 ISR voice bundles w/ 3 PVDM2-64 DSPs, 2 2-port T1 VWICs, and 2
  4-port FXO VICs each 

  CallManager servers:
  MCS-7825 v. MCS-7835

  Our environment will have 675 phones at time of install with projected
  growth of 250 phones in the next 5 years, and 4 T1s for PSTN interaction
  (2 DID, 1 WAT, 1 other).  Important to our consideration are redundancy,
  performance, ease of configuration and management, scalability, and
  cost.

  TIA,

  Matthew Brown
  High Point University
   




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