[sllug-members]: T1 Question

[Chris Brown]

Adam,

  Slight correction to Knight's email...  If you're using VoIP, G.711 
Codec, then the Codec uses 64Kbps +16Kbps overhead for 80Kbps total.  Of 
course other Codecs can be chosen (such as G.729 8+4=12Kbps) to use less 
bandwidth.  If channelizing the T1 (rather than using VoIP), however, 
one would dedicate 64Kbps per line full-time (with or without phone call 
in progress).

Chris Brown

Adam Barrett wrote:

> Excellent - thanks!
>
> On 1/2/07, Knight Walker <kwalker at kobran.org> wrote:
>
>> On Tue, Jan 02, 2007 at 10:55:31AM -0700, Adam Barrett wrote:
>> > Is a full T1 enough to support VoIP (5 lines) and internet access?
>>
>> Easily, though you will want to use some type of QoS on the link to make
>> sure VoIP traffic gets at the least packet loss and jitter.
>>
>> A T1 is (equivalent to) 24 voice circuits, each circuit being 64Kb/sec,
>> and most VoIP I've seen is between 32 and 80Kb/sec, depending on
>> compression and codec, so it should easily be possible.  You just want
>> to make sure that you have some kind of QoS scheme setup (May have to
>> talk to your ISP about this) to make sure VoIP traffic is prioritized
>> over web/streaming traffic.
>>
>> -KW
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>
>