SpectraLink 150 M3 MCU manual Prepare Demarc Blocks, Mcu

SpectraLink Corporation Link WTS Installation and Operation

When wiring the 8-pin connector, use the following table as a guide.

8-pin modular	MCU Pin	Polarity
connector	Function
1	Data 1	Any
2	Data 2	Any
3	Power 3	+
4	Power 2	-
5	Power 2	+
6	Power 3	-
7	Power 1	-
8	Power 1	+

4.4Prepare Demarc Blocks

The MCU connects to the existing telephone system using RJ-21 connections. An MCU is designed to operate with a specific interface to the telephone system: two wire digital or analog, or four wire digital. The number of demarcation blocks required for the system depends on the number and type of MCUs installed.

Interface Type	MCU	Wire	# Blocks
	Part Number	Pairs
Analog POTS	SCA-5XX	1	1
Universal Digital Interface	SCU-5XX	1	1
(Norstar, Meridian, Comdial,
Fujitsu, Inter-Tel, DEFINITY 2-
wire, NEC, Rolm, Toshiba)
Merlin Legend and	SCF-5XX	2	2
DEFINITY 4-wire
Mitel (DNIC)	SCX-5XX	1	1
Panasonic (Universal 2-wire	SCP-5XX	1	1
Auxiliary Digital)
Executone (Universal 4-wire	SCB-5XX	2	2
Auxiliary Digital)

If the wiring between the Link 150 M3 MCU and the telephone system leaves the building, consult your telephone system manual for instructions on providing adequate lightning and other over-current protection. All MCUs (except the analog interface SCA-5XX) are intended only for connection to the isolated side of an on-premise telephone switch. The interfaces are intended to connect to digital telephone switch ports that provide signals of 5Vp-p (max) AC component and some telephone switches provide a 48 V DC offset.

Part Number: 72-0075-01-C-W.doc Page 9