atcomsystems.ca/forum Forums Wiring - Telecom Carriers - Trunks & Services T1's, CSU's and DSU's T1 Configuration for IP Phones

1. You would need two GATM8 cards since they are 8-port units. I'm assuming that the carrier is providing a channel bank.

2. What? This is a data T-1? The BCM could use this if you were going to have remote IP phones. Since it has 24-data channels, their will be no dial-tone coming from this T. Unless you're doing some type of SIP trunking.

With all do respect, you seem to be in over your head on this project. I've read several of your other posts about this setup. Are you sure you want to be involved with this project?

Yes,this discussion is beyond my experience. I have programmed T1s ,but never installed a system with one. This is why I'm paying a tech to do the install who is on vacation right now. Until his return, I am trying to understand all I can on my own. I could just sit back and let him do it, but I would learn nothing this way. As a tech I hope to do this on my own after a few of these installs.

data network I now understand we'll be using 14 analog trunks brought in to the BCM by the integrated T1 and will use 2 GATM8 cards for dial tone. The IP phones will be on the data network and make use of the T1 with 24 data channels. Although they use 640k each, more than likely all 26 phones will not be on the network at the same time.

Now I need to learn how to bridge the data channels of the remaining 10 channels of the integrated T1 with the T1 configured for 24 data channels or with a fragmented T1, should it ever be needed for all 26 or more IP phones at once to be on the network. I would also guess that an IP phone would still function at less than 640k (maybe 590k), but the voice quality would degrade as the bandwidth decreased.

Only 6 IP phones will be pulling traffic from the T1, correct? You said you have 20 IP phones on-site and 6 off-site. The 20 on-site phones will not be using the internet to connect to the BCM.

Correction...After re-reading your post in the VoIP section, none of your phones will be using the internet. You stated that you have 20 phones at the main site, and 6 phones at a remote site fed by a Cat 5.

That is correct. When I said "off-site", I meant across the street 500 ft away, but still on the same network. My only concern was the signaling limitation.

It's funny, looking at this in hindsight.I was worried about changing the configuration but now it seems I don't have to reconfigure anything. I feel much better understanding it, however. Thanks to all for the advice!

I'm still wanting to know who the carriers are for the all data T1 and the muxed T1? Combining the two might not be as simple as you think depending on a number of factors. What type of routers are they and what handoff are you getting? 100base ethernet?

Is there a firewall involved and if so, what make and model?

I agree that, as far as I can tell, your bandwidth to the Internet should not come into play here because all of your VOIP traffic will remain on the local network.