As I understand it for the KX-TD1232:
POTS lines <= 12 (<= 8 if ISDN PRI or BRI installed which consumes the expansion slot for the 4 POTS lines)
ISDN BRI channels <= 8
ISDN BRI channels + POTS lines <= 12 (a design limitation?)
ISDN PRI channels <= 24 (maybe 32 outside of US)
The KX-TD1232 does not seem to be targeted towards situations that need/want ISDN. KX-TD500 was focused on this market. The new system might be more focused on this market too.
The whole thing depends on your LEC configuring ISDN properly in finite time. From many conversations with our ILEC (PacBell aka SWB), and CLEC (AT&T) I would stake my life on it.
The difficulty with configuration seems to be more of a problem with ISDN-BRI (which should give the same or more features than two POTS lines for the same money) compared to ISDN_PRI (which is very profitable for ILEC). What many small businesses need from a LEC is a ISDN-PRI pipe with dynamic multiplexors at each end that break out a ISDN-PRI for connection to a switch, (say up to 12 B channels with CPID, CNID, and supervision) and an ethernet port for internet bandwith (say limited to 4 D channels up, 22 D channels down) and give priority to the voice D channels. The multiplexors exist, and are used by large companies that lease satellite channels. No one has moved into this market for small businesses yet.
Another gotcha: ISDN NI-1 delivers calling party number only, while ISDN NI-2 delivers calling party number and name. However KX-TD1232 only supports NI-1. So CID over POTS delivers more that one can get from ISDN-PRI on the KX-TD1232.
As Charlie Brown says: Good Grief!
Paul H. Gusciora San Rafael, CA
-----Original Message----- From: "Dave Phelps" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Subject: RE: KX-T: ISDN Date: Thu, 25 Dec 2003 21:54:34 -0600
1] In theory, yes, you can make BRI work like DID (or DDI, as they're known pretty much outside the US). I hope you have better luck than I did getting my LEC to provision it. My telco said the same thing. You are also counting on the Pana being able to understand a DID-type service on BRI ports--many switches aren't programmed to use BRI's in this way (I can't speak for the Panasonic specifically).
2] AFAIK, you should still be able to use the loop start trunk ports.
3] Does the KXTD do LCR at all? Trunk groups, yes. LCR, I don't know (I don't work on the KXTD much at all).
4] Sorry. No clue on this one.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Andrea Coppini Sent: Thursday, December 25, 2003 5:54 PM To: 'KXT' Subject: KX-T: ISDN
Hi List,
I currently run a KXTD1232 with 32(D)+32(A) extension ports (almost maxed out) and 8 analogue trunks (maxed). I will be switching 7 of the 8 analogues to 4x ISDN BRI lines, which will give me 8 BRI channels.
My questions are: 1> will I be able to use DDI using the 4 BRI lines? I would like to 1> have each and every extension directly accessible from the outside world (eg. Ext. 213 can be called directly using +3562244 213, ext. 320 using +3562244 320, etc.). I know it can be done with a PRI, but are there limitations using BRI? The telco says they have no problem doing this from their end.
2> will I still be able to use the 7 unused analogue ports? I'd like 2> to use them to put in a Net2Phone (or similar) VoIP gateway.
3> will I be able to do LCR using both ISDN and analogue ports (eg. For international calls, try to use Net2Phone GW on analogue trunks, if it fails, use ISDN.)
4> Will I be able to manage all aspects of the ISDN ports using the 4> KXTD Programmator software?
Thanks for all your help. A
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