Digital extensions don't do well over long distances. Try setting up a analog extension and program your necessary functions into it.
Lee Brannen, MBA, President Brannen Electrical, Inc. 310 210 9669 (cell) 310-470-3268 (fax) www.brannenelectrical.com ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, November 13, 2007 12:00 PM Subject: kxt Digest, Vol 15, Issue 167 > Send kxt mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://kxthelp.com/mailman/listinfo/kxt > or, via email, send a message with subject or body 'help' to > [EMAIL PROTECTED] > > You can reach the person managing the list at > [EMAIL PROTECTED] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of kxt digest..." > > > Today's Topics: > > 1. Re: Proprietary Phone Wiring Problem (Larry) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 13 Nov 2007 12:49:34 -0600 > From: Larry <[EMAIL PROTECTED]> > Subject: Re: KX-T: Proprietary Phone Wiring Problem > To: [email protected] > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=windows-1252; format=flowed > > x x wrote: > >>I have wanted to post the following problem for a while but thought it was >>more of a wiring problem as opposed to a phone problem. With the recent >>posts I've seen, it's clear there are some members with expertise in >>wiring and so here goes. >> >>We have a KX-TD1232 installed with 32 extensions and 7 COs. The >>extensions are KX-T7433 and 7435 and are spread across 3 buildings with >>the TD1232 in the central building. The extensions all use a single pair >>on the digital connection. >> >>The extensions in one building do not work properly on some functions like >>speakerphone and they don't work at all when we are on battery backup. I >>traced the problem down to a voltage drop because the phones are so far >>away. They are 800' from the TD1232. The voltage at the extension is >>around 5 volts and so it is amazing they work at all. Anyway, the cable >>that was run when the system was installed is 50 pair 24 gauge underground >>in a conduit. The Panasonic manual says that we should have 22 gauge for >>that distance. In an attempt to reduce the voltage drop, we tried doubling >>up two pair of the 24 gauge wire (we have spares). What we found is that >>no matter how we double the pairs, the phones won't work at all. The >>voltage is much closer to 12 volts but there is just a constant ticking >>sound in the handset and the phone won't work. We tried use one pair on >>one side and another pair on the other side and that didn't work. We >>tried using one wire from each pair doubled and that didn't work. Using 2 >>pairs does certainly reduce the voltage drop but the extension doesn't >>work at all. Any ideas of why this won't work? Thanks for any advice you >>can give. Tom. >> >> > > Turn off the backlight. > > Paralleling pairs increases capacitance that will kill the 74xx. Cat5e > will have lower cap and helps. > > Make sure the cable starts at the ksu and ends at the set. one port > connected to two cables to two jacks, unterminated cable will cause swr > and mess up the connected set. (done to allow a pits at one place and a > slt at another place on the same port) > > you can usually get away with a 70xx set since the voice is on the first > pair, and the digital signal doesn't have the high speed digitized > voice. (if only have prob at a few distant sets) > > There is also the add a small series supply at the set end. the old > loopextender ;-) idea I still don't like. > > good luck > > -larry / dallas > > > > > > ------------------------------ > > __________________________________________________________________ > KX-T Mailing list -- http://kxthelp.com/ > Subscription changes: http://kxthelp.com/mailman/listinfo/kxt > > > End of kxt Digest, Vol 15, Issue 167 > ************************************ > _________________________________________________________________ KX-T Mailing list --- http://kxthelp.com/ Subscription changes: http://kxthelp.com/mailman/listinfo/kxt
