>if you didn't need the the simulated telco switch d-channel, then your best >bet would be to use a PBX system. in other words, if you simple needed the >lines to be circuit switched like a isdn cloud would do without the actual >isdn protocols.
No, this specifically needs full D-channel signaling as well as analog loop supervision (both station and PBX, including E&M). The application (not for a public lab) involves training/testing on both PBXs and IP telephony. Cost isn't a huge constraint, but there is reality of size, etc. -- otherwise, I'd put in a CO switch. Several people have suggested the Adtran 800. I'm not yet sure if that won't need to be supplemented with a router for alternate-path IPT and frame switching. Some have suggested the Adtran can do the frame switching and fractional T1 DACS function. > >this is basically putting in an NT2, but bypassing any need for a NT1 by not >having any real outside isdn service. > >scott > >""Howard C. Berkowitz"" wrote in message >news:[EMAIL PROTECTED] >> We've all dealt with ISDN simulators, that look like a CO to a single >> or small set of interfaces. I'm dealing with a situation where I need >> to interconnect several simulated training sites (i.e., physically in >> the same room) and telephony servers through a PSTN simulation. >> >> In other words, I need a small CO switch, with the ability at least >> to interconnect several trunks (probably both T1 E&M and ISDN PRI), >> with a static calling plan among tens of telephones. The switch would >> emulate several end offices, plus the PSTN interoffice connectivity >> between them. For the latter, however, I don't need to have physical >> interoffice trunks as long as I can simulate their effect in a >> dialing plan. >> >> The switch should also be able to simulate dedicated data links between >> sites. >> >> In the real world, this is no problem to do with off-the-shelf >> equipment that would support thousands of lines. Within the Cisco >> product line, I suspect I get close with an MGX or the like, but >> probably fall short in circuit-switch call supervision and routing. >> >> Thoughts? I'm going to review my Nortel Passport documents to see if >> it has the loop supervision capabilities available; I vaguely >> remember a version that might. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=64671&t=64628 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
