how to add a 16-port digital card and phones to free exp port??

[dgr72371]

hello,
at my office, we've maxed out all the expansion slots in our current Definity G3 switch, software version soft. ver: G3V4i.03.0.048.3 (it's from the early 90's).

We've been told that the best way to free up an expansion slot is to turn two of the 8-port digital phone cards (TN754/754Bs) into one 16-port digital

phone card. The 8-port cards use 4 wires and from what i've read the 16-port cards use two wires, but when I've looked at some 6400 series and 8400

series phones, it looks like they take the same 8-port/ethernet-like jack as our current phones (7400 series).
I need to order a new 8-port card and some compatible phones in the next couple of days to free up an Expansion slot in our switch ASAP.

(1) I haven't seen anywhere saying that our 7400 series phones will work on a two-wire dig. ph. card, so I'm assuming we need to buy new phones from

the 6400 or 8400 series? If so, which models will work that have Caller ID Display and will work with the version of Definity we have?
(2) which 16 port card will work with our definity soft. ver: G3V4i.03.0.048.3 ?
(3) assuming it's an "ethernet" type of phone jack that plugs into the bottom of these phones, which two wires of the 8 in a cat5e cable do I use and what

position in the jack do they go? I've never wired these type of phones before, only the analog type with the smaller jack and the digital 7400 series

phones that use four wires.

thanks in advance for your help!
david

 

[dgr72371]

I meant to say above:
I need to order a new *16-port* card and some compatible phones in the next couple of days to free up an Expansion slot in our switch ASAP.
: )
thanks,
david

 

[lopes1211]

6400's and 8400's will work on the 2 wire cards. The 7400's will not work on the 2 wire cards.

TN2181 - 16 port 2W(maybe $40 ebay) and TN2224 - 24 port 2W (maybe $100 ebay)

-CL

 

[mikeydidit]

The 8400 and 6400 series phones will work behind the 16 port packs, however these are older packs and I do not believe you are going to find these as "New". The 8400 can be 1 or 2 pair so you could use either pack. They wire up same as your 16 port analog phones. 1 pair to the white/blue.

Hell, there are no rules here - we're trying to accomplish something.
Thomas A. Edison

For the best response to a question, read faq690-6594

 

[4merAvaya]

If you have the large refrigerator size cabinet you can put non-cabled packs, such as Call Classifiers (TN744) and Tone Detectors (TN748) in the Service Slot (Slot 00) of the B, C, D, & E carriers. That may free up some slots.

The TN2224 2-wire digital board was not introduced until V5. It won't work in your system.

Kevin

 

[dgr72371]

lopes1211 & mikeydidit:
thank you for the helpful and quick answers!
after looking on eBay, I think I'm going to go with a TN2181 - 16 port 2W card and some 8410D phones. So this combination of card and phones will work 100% in our G3V4i.03.0.048.3 (it's from the early 90's) switch? I have some concern about the software on the switch being "too old"....hopefully it's not.

second question: the way the current 4-wire digital phones are wired, when looking at the jack that goes into the bottom of the 7400-series phones we currently use, it's the left (or right depending on how you look at the jack)-most 4 wires, which are the colors: orange striped, orange solid, green striped & blue solid.
When I do the wiring for these new 2-wire digital phones, from what mikedidit said, am I supposed to use the middle two wires in the standard cat5e 8-wire/4-pair cable, the blue solid and blue striped?
thanks,
david

 

[mikeydidit]

It would actually be the first pair of the 4 pair. The white and blue. Then strap that to the white blue on the jack.

Hell, there are no rules here - we're trying to accomplish something.
Thomas A. Edison

For the best response to a question, read faq690-6594

 

[caspian11]

Also, the 16 ports are on pairs 1-4, 9-16, and 21-24 of the 24 pair connector.