[Asterisk-Users] 100 analog phones?? HOWTO?

Petr Grussmann petrg at opavanet.cz
Tue May 25 20:30:12 MST 2004


I use about 300 IP phone combination Welltech LP101, welltech LP102 
welltech3502-8, Cisco 7905 and Cisco 7960

Steven Critchfield wrote:

>On Tue, 2004-05-25 at 18:38, Jeff Gustafson wrote:
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>>On Tue, 2004-05-25 at 14:06, Steven Critchfield wrote:
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>>>>	In theory Asterisk shouldn't have a lot of load.  It's simply routing
>>>>calls (at 64kbit) and not converting them from one codec to another.
>>>>        
>>>>
>>>While there is no codec, there is echo canceling and there is servicing
>>>the cards in a timely manner. So you need a pretty decent machine so it
>>>can handle the timing, but it won't be slammed.
>>>      
>>>
>>	I noticed that one of the Adtran boxes can have an optional echo
>>cancellation module.  When I asked a VAR about this they said it was a
>>special order item that they never kept in stock.  According to the
>>Adtran web site the module is designed for "packetized voice
>>applications."  It sounds at though Asterisk wouldn't have to put cycles
>>to echo cancellation with a module like this.  
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>Unless you do VoIP on something with a larger delay than your LAN, there
>isn't much to worry about.
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>>	I was also thinking that if I used more than one machine with TDMoE I
>>could potentially have better performance. 
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>I still doen't understand why someone would do TDMoE when IAX provides
>more flexibility. 
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