[Asterisk-Users] 3 x TDM400P in one PC ??

[Andres Paglayan]

Why the channel bank if he will be routing extensions to ip phones?
The T-1 card should suffice if he isn't serving analog extensions.
Thats $600 (t1) instead of ~ $1000.(3 x 3?? tdm400p)
line cost wise 12 channels on a t1 should be cheaper than 8 pots.

Walt Reed wrote:

>On Fri, May 06, 2005 at 10:25:24PM +1000, Joerg Wleklik said:
>  
>
>>On Fri, 6 May 2005 22:10, Eric Wieling aka ManxPower wrote:
>>    
>>
>>>Joerg Wleklik wrote:
>>>      
>>>
>>>>Does anybody have experiences with plugging 3 TDM400P cards in one PC??
>>>>
>>>>        
>>>>
>>>If you need 12 ports then you should use a T-1 card and a Channel Bank.
>>>
>>>      
>>>
>>That would be easy, but......
>>
>>I have 8 analogue lines incoming right now and changing the phone number is 
>>not an option (costs for advertising). This lines go right now into an 
>>analogue PBX. A new building will get IP-Phones connected to an asterisk box.
>>The idea is to take the incoming calls in the asterisk, route to the new 
>>building via IP and serve the old PBX with 4 analogue lines. 
>>    
>>
>
>That's what the channel bank does. 
>
>The other reason you want to use a T1 card over multiple TDM400 cards is
>that the 3 TDM cards will generate 3 times the number of interrups, and
>likely have interrupt sharing problems. Good channel banks also are
>going to be much less prone to have echo problems. You also will have
>room for expansion.
>
>BTW, if you went with a new T1/PRI to the telco, you can probably have
>your old numbers forwareded / migrated.
>
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