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Nate Pinchot
Asked: 2010-03-11 10:02:01 +0800 CST

Is it a bad idea to run voice and data over the same bonded T1?

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Currently we have a T1 which we use for both our voice and data.
We are looking at getting a bonded T1 but have been told by the provider that it would be a bad idea to run both voice and data on a bonded T1 (Multilink PPP) and that we should either:

A) Put in a bonded T1 for data only and have a 2nd non-bonded T1 for voice, or
B) Put in a 2nd T1 for data only and make the current T1 voice only

We don't use the voice as much and the reason we looked into a bonded T1 is for more internet speed, but obviously we still need to keep voice services with good quality and reliability. Unfortunately T1 is the only thing available to us since all the lines here are copper.

I am not familiar with bonded T1s. Tried googling about bonded T1s and having both data and voice on it but couldn't come up with anything helpful. So my question is, will we lose service quality by getting a bonded T1 and putting both voice and data on it?

telephony t1 voice

1 Answers

  1. Best Answer

    By voice, do you mean 1.) you're using a MUX to split channels out of the current T1 for voice, or 2.) you've got VOIP as part of your data traffic?

    1. I don't think there would be any difference whether your link was 1 T1 or a MPPP link, as long as all of your MUX and termination equipment supported MPPP. You'd have to confirm that it would work though, so that may be what the mean. Maybe your existing equipment doesn't and they're trying to save you the cost of an upgrade.

    2. If it's all data (VOIP is just data) then it doesn't make a lick of difference what the link is. As long as you're giving priority to the VOIP, you could be using T1, T3, dial-up, cable modems, ham radio, ISDN, carrier pigeons, smoke signals - you just want to give priority to VOIP and ensure that you don't fill the pipe. Of course, you do also need to concern yourself with latency, jitter, etc - but those factors are independent of what the pipe is (although some will be less suitable.)

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