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markysharkey
Premium
join:2012-12-20
united kingd

CME to Analog PBX.

Afternoon all!
I have a 2901 with CME 8.5.
I'm all good with getting the internal calls up an running and connecting to the PSTN using PLAR for incoming calls etc. What I need to know is this;
In the office we have a Panasonic PBX talking to Panasonic KX-T7433 phones. It seems to me that the PBX is providing voltage similar to what I would expect with a PSTN line. So what would happen if I took the lead out of the Panasonic phone and shoved it into the FXO port of the 2901? Can I treat it the same as a PSTN line?
The task is to demo some Cisco phones and prove that integration / migration is possible with minimal disruption. But I want to do this one step at a time so first things first, lets route some calls.
--
Binary is as easy as 01 10 11


cramer
Premium
join:2007-04-10
Raleigh, NC
kudos:8

It's a proprietary DIGITAL PBX phone. (as best I can tell.) So, no, it will not work plugged into an FXS port. (phones plug into FXS (station) ports, switches plug into FXO (office) ports.)

Best case, nothing happens. Worst case, it fries the phone and the port.


aryoba
Premium,MVM
join:2002-08-22
kudos:4
reply to markysharkey

Best to consult the Panasonic's documentation before testing I guess


markysharkey
Premium
join:2012-12-20
united kingd

RTFM... yeah I probably should.
Cramer, I definitley said FXO port...
--
Binary is as easy as 01 10 11


cramer
Premium
join:2007-04-10
Raleigh, NC
kudos:8

The PBX goes into an FXO port. Phone handsets go in FXS ports.

If the PBX is designed for an analog CO line, then it might work. Depends on the type of FXO port and type of CO line the pbx expects. (loop start, ground start, etc.)


markysharkey
Premium
join:2012-12-20
united kingd
reply to markysharkey

What I want to do is yank the line out of the telephone on my desk and shove it in to the FXO port of the CME router.
The phone on my desk seems to be analog with an RJ11 connector using 2 pairs. The phone gets voltage (30 volts according to the manual, which offered little else to help me, BUT, I'm not even sure what would help me at this point so it's difficult to even decide what info is relevant) which powers the LCD screen etc. To me this seems similar to a regular PSTN line here in the UK which supplies voltage (50 volts on a BT line) to the CPE handset.
I need to check if it's ground or loop start but that's an easy one in the CLI if I fail to Google it.
Before I go plugging the RJ11 into the FXO card I need to know if I can damage my Cisco kit. If it just won't work, that OK. But if I break the CME router or FXO card, that would not be OK! Any ideas?
--
Binary is as easy as 01 10 11



TomS_
Git-r-done
Premium,MVM
join:2002-07-19
London, UK
kudos:5

I would recommend talking to someone qualified with Panasonic PABXs...

Whats more expensive, a replacement router, or a little bit of cash for some consulting?


cramer
Premium
join:2007-04-10
Raleigh, NC
kudos:8
reply to markysharkey

What I want to do is yank the line out of the telephone on my desk and shove it in to the FXO port of the CME router.

Now I've got the picture...

From everything I've seen (which is admittedly little -- long ago EoL'd technology), it's a digital PBX system. As such, if you plug it into a Cisco FXO port, there's a very good chance you'll fry the port. (I'm not going to tell you how many ports I've seen damaged by people digital phone systems into them.)

My advice... don't try it on anything you aren't willing to replace. Try it on a buttset or old analog phone first.

PS: a POTS line is a single pair. tip and ring. I know several PBX systems send power down an extra pair. The FXO card shouldn't have any connections on those pairs, but might!

markysharkey
Premium
join:2012-12-20
united kingd

TomS and Cramer;

Gotcha. Thanks.

On to the next...
--
Binary is as easy as 01 10 11



battleop

join:2005-09-28
00000
reply to markysharkey

You would need an FXS port and not an FXO. FXS ports would act like a POTS line to the PBX or an analog handset. If you have a Panasonic PBX then you would connect the CO line on the PBX to an FXS port on the router. You will not be able to connect the handset directly to the FXS port.
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I do not, have not, and will not work for AT&T/Comcast/Verizon/Charter or similar sized company.



battleop

join:2005-09-28
00000
reply to cramer

"The PBX goes into an FXO port. Phone handsets go in FXS ports."

The PBX would go into an FXS port. From the router's point of view the PBX is a station.
--
I do not, have not, and will not work for AT&T/Comcast/Verizon/Charter or similar sized company.