[cisco-voip] a stack of VG224s vs C3945-112FXS/K9

[Lelio Fulgenzi]

So I'm looking at migrating a large number of analog lines to our Cisco solution. Right now, the most economical approach is a stack of VG224s, however, Cisco has a (new) bundle, the C3945-112FXS/K9. The per port cost is still quite a bit more (almost double) so I'm finding it difficult to justify even to myself, let alone mgmt. SmartNet costs are about equal, with the 3945 bundle just a bit cheaper. 

I understand that I would be managing 4.5 VG224s to every 3945 bundle, but really, once these things go in, they're really just left alone. 

Some other things I've been thinking: 


    • Pro: 3945 has a slightly denser port count per RU (112/4RU vs 96/4RU) 
    • Pro: 3945 would use less uplink ports (2 per 112 vs 8 per 96) 
    • Con: H/W issues would bring down 112 ports 
    • Con: shelving a spare would be much more expensive 
    • Con: configuration would be a bit more complex, different port types 
    • Con: not known if SRST registration would behave the same way to a core 3945 

What do others think? What would you do? 

Lelio 



--- 
Lelio Fulgenzi, B.A. 
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1 
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN) 
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
Cooking with unix is easy. You just sed it and forget it. 
- LFJ (with apologies to Mr. Popeil) 


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