On Mon, Jan 28, 2002 at 10:42:13PM -0500, David Lesher wrote: > Unnamed Administration sources reported that Kurt J. Lidl said: > > > > On Mon, Jan 28, 2002 at 12:07:38AM -0800, Paul H. Gusciora wrote: > > > Are KX-TD programs #423 #427 #428 #429 focused on the S/T bus interaction > > > between the KX-TD and the LEC? > > > > I believe this to be true. > > I don't have any Pana hardware here, so I'm shooting from the hip, > but... > > Note that: > > CO-----[NT1]=====[KXTD] > U S/T > > > There are no parameters to specify to an NT1; It's a dumb 2->4 wire > adapter. (Sophisticated but dumb..). > > CO-----[NT1+KXTD] > U S/T > > Ergo, this config (w/ internal NT1) will look the same to software..
I'm not arguing that. For ISDN, there is a defined standard way of hooking up more than a single piece of gear to a S/T interface. There is not a defined way of hooking up multiple pieces of gear to a U interface. > > > Or do you think that the KX-TD systems can drive an ISDN telephone on one > > > of the extensions? > > > > I have no reason to believe this. I suppose it could be true, I do know > > that the digital PT sets use an ISDN-like signaling protocol. > > I have been told that at least one of the Pana cards WILL drive either > stations or trunks... Well, as you pointed out, the S/T interface is 4 wire (2 pair, one for Tx, one for Rx). As we all know, the Panasonic proprietary phones use a single digital pair for all the phone functions. I could believe that the KX-TD switches use a varient of a U interface to drive the phones. (Hmmm, that two-line conferences limit comes to mind as well.) > > > If NI-1 is a standard, I wonder if there are a set of standard ordering > > > sheets? Maybe one could purchase a document from Bellcore (or whatever > > > they are called these days)? The document might be cheaper than the time > > > wasted trying to achieve a mind meld with the LEC ordering representative. > > You could buy the NI-1 docs from Bellcor^H^H TelCORDia. You'd be lots poorer > and little smarter. Lots of "National" is in effect defined on the fly by the > switch software folks. I read a bit of those when we were trying to get ISDN to go for the first time at UUNET. Mind numbing. > > If the KX-TD system had *any* diagnostic tools showing what the heck > > was going on with respect to the ISDN signaling, that would be a huge > > step in the right direction. > > True.. I suppose having an external ISDN protocol analyser would be a good thing. Taking a quick look, the only BRI boxes I found operate on the S/T bus, and are passive devices. So, I'm out of luck (as I have a U interface) for using one of these. -Kurt _________________________________________________________________ KX-T Mailing list --- http://kxthelp.com/ Subscription changes: http://kxthelp.com/mailman/listinfo/kxt
