General DataComm 551 Operating And Installation Instructions page 46

INSTALLATION
EQUIPMENT CONNECTOR (25-PIN FEMALE, LABELED
BUSINESS EQUIP 1 - BUSINESS EQUIP 4 (CONNECTS
THE MULTIPLEXER TO THE CSU.
PIN NO. FUNCTION
1 FRAME GROUND
2 SEND DATA (TIP)
3 RECEIVE DATA (TIP)
14 SEND DATA (RING)
16 RECEIVE DATA (RING)
TERMINALS 1 AND 2 ON 4-POSITION TERMINAL BLOCK (LOCATED
UNDER WHITE PLASTIC COVER, AND LABELED TB1 - TB4 (CONNECT
THE TELCO-PROVIDED 60 MA DC CONSTANT CURRENT SOURCE TO
PROVIDE POWER TO THE T1 SPAN.
TERMINAL NO. FUNCTION
1 MA OUT
2 MA IN
3 FLF
4 FLF
FLF: FAULT LOCATION FILTER (FUTURE USE)
NETWORK INTERFACE CONNECTOR (RJ48C, LABELED NET 1 - NET 4)
CONNECTS THE NETWORK TO THE CSU.
CABLE CABLE
022H024-XXX 022H021-XXX
PIN NO. WIRE COLOR
1 ORN/WHT
2 WHT/ORN
4 BLU/WHT
5 WHT/BLU
7 DRAIN
NOTE: THE REMAINING LEADS ARE NOT USED.
SUPERVISORY PORT CONNECTOR (25-PIN MALE, LABELED
AUXILIARY 1 - AUXILLIARY 4) CONNECTS THE SUPERVISORY
TERMINAL TO THE CSU.
PIN NO. FUNCTION
2 SEND DATA
3 RECEIVE DATA
4 REQUEST TO SEND
7 SIGNAL GROUND
8 CARRIER DETECT
THIS PORT IS ENABLED ONLY WHEN PMC-100 OPERATION IS DISABLED.
FIGURE 2-10. UNIVERSAL SYSTEM SHELF INSTALLATION
2-20
DIRECTION
N/A
TO CSU
FROM CSU
TO CSU
FROM CSU
FUNCTION
RECEIVE DATA (RING)
RECEIVE DATA (TIP)
SEND DATA (RING)
SEND DATA (TIP)
SHIELD (FRAME GND.)
DIRECTION
TO CSU
FROM CSU
TO CSU
N/A
FROM CSU
X BUS CONNECTORS FOR COMMUNICATION BETWEEN
PMC-100s. REFER TO PMC-100 MANUAL FOR DETAILS.
DIRECTION
TO CSU
TO CSU
FROM CSU
FROM CSU
N/A