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HELLFIRE
MVM
join:2009-11-25

HELLFIRE to mozerd

MVM

to mozerd

Re: [Windows] Help with Office Network (T1)

Hey mozerd, curious where some of your numbers came from.

IIRC, VOIP typically uses either the G711 (64kbps/call) or G729 (8kbps/call) codec. Assuming the OP is using G711,
64kbps/call x 5 phones = 320kbps, then x 2 for the bidirectional; not sure where you're pulling the 128kbps from.

Also IIRC T1 is rated for 1.544Mbps, so bidirectional would be 3.088Mbps.

Either case, I agree with your assessment that if other data-intensive traffic is crossing the wire at the same time
as the calls, then OP needs to rethink the setup.

Regards
cramer
Premium Member
join:2007-04-10
Raleigh, NC
Westell 6100
Cisco PIX 501

cramer

Premium Member

»www.cisco.com/en/US/tech ··· e2.shtml

64K is the CODEC sampling rate. There are more bits necessary to actually transmit it.

shdesigns
Powered By Infinite Improbabilty Drive
Premium Member
join:2000-12-01
Stone Mountain, GA
(Software) pfSense
ARRIS SB6121

shdesigns

Premium Member

said by cramer:

»www.cisco.com/en/US/tech ··· e2.shtml

64K is the CODEC sampling rate. There are more bits necessary to actually transmit it.

The sampling rate of nearly all the codecs is 8K samples/sec.

As 7.11 uses 8 bits per sample, the CODEC bit rate is 64kbps.

mozerd
Light Will Pierce The Darkness
MVM
join:2004-04-23
Nepean, ON

1 recommendation

mozerd to HELLFIRE

MVM

to HELLFIRE
HELLFIRE, experience has no substitute -- Inexperience carries significant cost and risk. I've forgotten how many botched up installations I've had to redo based on Telco geezers believing that they follow specs to the letter and refuse to adapt to reality.

With VoIP I've leaned that 80Kbps full duplex does not cut it --- 128Kbps full duplex works very nicely each and every time especially under load of concurrent usage.