sba8_ltd@uhura.cc.rochester.edu (Scott Barnes) (10/31/90)
Over the past few months, I have been unable to place modem calls using Least Cost Route (LCR) long distance on our Rolm CBX 9000 PBX. The calls do complete, but the local and remote modems usually refuse to handshake. This probably sounds like a typical modem failure, but there is a twist to the problem. Explicit AT&T credit card modem calls are successful, as are local calls. I have duplicated this situation several times using different modems. The problem seems to lie somewhere outside the Rolm system, but I have been unable to put my finger on it. Is is possible that one of the LCR carriers has an entire rack of faulty equipment (i.e., distorting the frequency of the call)? Would the LCR trunks be distinct from AT&T and local trunks in the Rolm system? Any clues or assistance would be appreciated, as I would like to know what I'm talking about before I report this problem. Scott Barnes University of Rochester sba8_ltd@uhura.cc.rochester.edu
BRUCE@ccavax.camb.com (Barton F. Bruce) (11/02/90)
In article <14182@accuvax.nwu.edu>, sba8_ltd@uhura.cc.rochester.edu (Scott Barnes) writes: > Over the past few months, I have been unable to place modem calls > using Least Cost Route (LCR) long distance on our Rolm CBX 9000 PBX. > Is is possible that one of the LCR carriers has an entire rack of > faulty equipment (i.e., distorting the frequency of the call)? Would > the LCR trunks be distinct from AT&T and local trunks in the Rolm system? There are all sorts of possible problems, but you need to ask your admin. who the other carriers are and HOW they are connected to your switch. If there is a leased T1 line to their POP, and if some 'clever' chap decided that 44 ADPCM voice channels was a better choice than 24 PCM ones, that IS your problem.