Having spent many hours crunching the numbers a T1 is only economic with
over 12 lines
but if you look at the problem from a bandwidth vs channel point of view
the DSL or cable looks
pretty good, especially if you can use both at the same time and load share.
The math goes something like this: T1 23 =1 channels for a total of 1.55
Mbs - cost $700 per month
A DSL and Cable broadband (with load balancing) 1.6 Mbs upstream (2x
800kbs) - cost $100 per month
This assumes that all 23 channels are being used at the same time which
of course is unlikely.
As a rule of "thumb" 23 channels would support 50 to 75 extensions
Being conservative, a good DSL or Cable Broadband connection should
be able to handle 10 simulatanious calls
which would support 20 to 35 business extensions. - cost $50 per month
+ DID
10 analog lines will cost $450 per month.
For me, this is a "no-brainer" --
John Lange wrote:
But thats over $100 per line not including DIDs.
So are you going to go to a client and say; "here is this new phone
system. And BTW if you buy our system your line charges are going to be
doubled compared to if you choose our competition."
Fractional PRIs are not economical for anything less than 15 channels
and that still leaves a huge gap between 5-60 users (assuming a 4:1
users to lines ratio).
John
On Thu, 2006-07-27 at 14:16 -0400, Justin Sweeney wrote:
I ordered a Bell PRI and only enabled 5 channels. Works great and is
a bit cheaper than a full span. So much better to avoid the hassel I
think (all the reliability and features of digital) About $600 per
month I think.
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Henry L.Coleman [ VoIP-PBX ] Tel.1 866 415-5355 Ext.301
