Another question, Is anybody using the Tellabs 2572 EC with a PRI. When we moved from our analog lines to a PRI, I thought it would be simple stuff moving the EC to the PRI. Changed signaling, made sure that channel 24 wasn't being ECd and everything came up. But, I was getting complaints of random echo on the PRI. Local echo. Also, we weren?t able to do any kind of modem dial-outs (Adit 600 supplying the dialtone). Funny thing is that inbound/outbound faxing was working fine. Removed the Tellabs and turned on the software EC and everything started working fine. I'd really like to move back to the Tellabs, so if anybody has suggestions, please speak up. Forgot to mention in the last post, I'm using a Sangoma A102 with the current Beta 7 drivers. Doug -- Ben Franklin quote: "Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety."
I had a similar problem. Turned out I wired it backwards. The Tellabs only does EC in one direction. Doug Lytle wrote:> Another question, > > Is anybody using the Tellabs 2572 EC with a PRI. When we moved from our > analog lines to a PRI, I thought it would be simple stuff moving the EC > to the PRI. Changed signaling, made sure that channel 24 wasn't being > ECd and everything came up. But, I was getting complaints of random echo > on the PRI. Local echo. Also, we weren?t able to do any kind of modem > dial-outs (Adit 600 supplying the dialtone). Funny thing is that > inbound/outbound faxing was working fine. > > Removed the Tellabs and turned on the software EC and everything started > working fine. I'd really like to move back to the Tellabs, so if anybody > has suggestions, please speak up. > > Forgot to mention in the last post, I'm using a Sangoma A102 with the > current Beta 7 drivers.
Eric "ManxPower" Wieling wrote:> I had a similar problem. Turned out I wired it backwards. The > Tellabs only does EC in one direction. >The Tellabs that I have do Sender side EC as well. But, I plan on being on site next weekend and will try switching the wiring around. Thanks for the input, Doug -- Ben Franklin quote: "Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety."
Doug Lytle wrote:> Another question, > > Is anybody using the Tellabs 2572 EC with a PRI. When we moved from > our analog lines to a PRI, I thought it would be simple stuff moving > the EC to the PRI. Changed signaling, made sure that channel 24 wasn't > being ECd and everything came up. But, I was getting complaints of > random echo on the PRI. Local echo. Also, we weren?t able to do any > kind of modem dial-outs (Adit 600 supplying the dialtone). Funny thing > is that inbound/outbound faxing was working fine.Figured this one out. The Tellabs cards that I've been purchasing have the send side echo canceller (Option 38). This works great on analog lines, but apparently won't work on a PRI. Turned it off and now I can use modems. Since this was put into place over the weekend, it remains to be seen if it takes care of the local echo. Doug -- Ben Franklin quote: "Those who would give up Essential Liberty to purchase a little Temporary Safety, deserve neither Liberty nor Safety."