NEC Wireless Transceivers

Transceivers should be mounted as high as possible and 20’ away from other transmitters. Transceivers should be visible from the floor for troubleshooting. The typical Elder-Beerman store is about 52,000 square feet, or 230’ by 230’ inside. We place transceivers in the center of each quadrant in a store, taking in mind peripheral locations such as customer service and shipping-receiving. Avoid attaching to vertical steel columns, as the column will block the signal. Each transceiver needs a 4 pair wire (prefer Cat V, plenum rated typical) run back directly to the phone system. Leave spare wire (20-30’) above the ceiling at the transceiver in case you need to relocate the transceiver. Attach an RJ-45 male jack onto the end with the transceiver and plug in and attach to ceiling using tie wraps. RJ-45 jack (568B) wired as follows:

a. Looking at the jack from the top (tab down) and the wire going towards your body:

Pin 1=White/Orange

Pin 2=Orange/White

Pin 3=White/Green

Pin 4=Blue/White

Pin 5=White/Blue

Pin 6=Green/White

Pin 7=White/Brown

Pin 8=Brown/White

One pair transmits power to the transceiver; another pair sends an ISDN signal from the phone system to the transceiver. A circuit board (2CSIA) in the NEC 2000 phone system can generate two ISDN lines to feed two transceivers. A control circuit board (SC-03 in slot 11) provides supervision for up to 4 ISDN cards.

For the wireless only installs, we will be using LTC-0 cable only.

LT00 – PN8COT card

LT01 PN-2CSIA card

LT02 PN-2CSIA card

Punch down the first transceiver as follows, starting on Pair 9 (Red/Brown):

White/Green to RA0; Green/White to RB0 (Pair 9)

Blue/White to TA0; White Blue to TB0 (Pair 10)

Next transceiver on pairs 11+12

Then skip to pairs 17+18 and pairs 19+20

The transceivers have two lights. The power light is on the left and should be green if the unit has power.

The status light is on the right. If it is red, it is not getting signal from the PBX.

a. Solid Green. Ready for use, no phones using this unit.

b. One blink every 2-3 seconds = one phone in use

c. Two blinks every 2-3 seconds = two phones in use

d. Solid, but one blink every 2-3 seconds = three phones in use

Note: Maximum of three phones in use at any one transceiver at a time.

When you have the wireless phones working, walk around the store and make sure you have good signal coverage in all locations. If not, you may have to relocate a transceiver to provide coverage.