Lucent system phones power on Partner ACS R6 1

[CKTA]

Hello all,
Currently, when we need a system phone (such as Lucent 18D), I run a 4-wire connection from the Partner ACS station port.
This is not always practical because we have long (600ft +) runs snaking through trees, poles, conduits and groundhog burrows. Some remote buildings have only one intact pair.

I'm wondering if I really need the second pair all the way from the ACS to the station.

Do I understand correctly that the outside pair on any station port on the ACS module provide sonly good ol' 48V power, and no signal? If that is so, couldn't I just slap a 48V DC power supply at the station and wire it to the outside pair on the jack? The obvious answer "try it" is not possible because I am currently 300 miles from the premises.

Also, our ACS module is connected to a cross-connect block through a 25-pair cable with an Amphenol connector (going through a surge protector). This is for ease of installation/removal, as the unit must be removed and stored by non-technical staff during winter (no power or heat in the building during winter).

So I am limited to 25 pairs from the ACS module. Do I understand correctly that I could feed all my system phones from one single 48V source from the ACS module, or from an external source, instead of running two pairs from each station port?

Thanks for your advice or opinions.

 

[TouchToneTommy]

No, your understanding is incorrect.

Partner system phones require 2 pairs. The center pair, Green and Red, are like a single line Tip and Ring. It carries the audio and can have a single line telephone bridged on it. The outer pair, Black and Yellow, carry digital information between the phone and the control unit, as to what to display, which buttons are being pressed, etc. So no, you can not substitute a power supply for either pair, they must be continuous.

 

[CKTA]

Aw, shucks. Was too good to be true.
It does make sense though: why would they send power all the way on the wire when a power supply is much simpler.
Thanks!

 

[WikiTech]

You only need one pair for system dial tone. You can plug a single line telephone directly into the port and it will work. This is beneficial for cordless/wireless telephones if you wish to utilize. I like to program auto-line select to the intercom first, then to the lines. This means when I go off-hook on my cordless, I am automatically on the intercom then I can simply "dial 9" for an outside line.

 

[CKTA]

This is also what I do. The phone system is used mainly for intercom, this being a summer camp for children, few people have a need to call outside. Staff members mostly use internet for calling outside, for which we have wifi hot spots in a few places.