search for: 257x

...my PRI's. I was wondering if anybody else > was using a hardware echo canceller capable of 24 T1's, how well it works and an > approximate price range:) > {clip} I assume you meant a 24 channel T1... Regardless, even if you meant 552 B channels the older (now obsolete) Tellabs 257x cancellers work quite well and are very inexpensive, however you may still encounter issues if you are facing any very long endpaths (ie. > 64ms, such as with digital cordless handsets). See http://www.voip-info.org/tiki-index.php?page=Tellabs%20Hardware%20Echo%20Cancellers for details. Approx...

Hi all, We have just installed a * server (CVS head) with a TE110P card and a IDSN20 line, we are using the GXP-2000 handsets running the latest firmware (.9). Some of the calls we are receiving have echo at the our end (we can hear ourselves speak). We have a traditional ISDN telephone system here as well and when I make a call from one of the handsets asterisk answers, directs the call to

I am getting ready to experiment with the Tellabs 2752 echo canceller. I have a 255D shelf (and power supply), but am struggling a little on connecting the echo canceller to a PRI. The shelf has 4 25-pair amphenol connectors. The two on the line side are marked "Receive In" and "Send Out". The 2 connectors on the drop side are marked "Send In" and "Receive

Using TDM400's here and I have tried everything to cure the echo. I have used the Milliwatt test from the telco and from asterisk to tune RX/TX gain via a patched ztmonitor. What happens is I experience midcall echo. I turned on aggressive_suppressor and it seems to do great. The problem happens with misc. noise around the office will cause it to mute the other end of a phone call while