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DCP Mode 2 Networks — Modem Pooling 5-11
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Rack-Mount Equipment
The following equipment is required when rack-mounted modem pools are used (i.e., a D-Lead modem
pool):
• 72-inch Data or Auxiliary Cabinet and power supply
• The 2296A requires a 105A mounting
• One of the following multi-mounts for the data sets:
— The MTDM requires a 46A2 mounting
— The 7400A requires a 77A mounting
Cabling
Cabling for multi-mount arrangements is provided with the cabinet and the mountings. One D-Lead cable
(RS-232C to 25-pair cable), one 25-pair cable for each mounting, and one M25 RS-232C cable for each
modem pool pair is required.
Cabling for stand-alone modem pools consists of a 104A adapter, an M25 RS-232C cable (male-male), a
D8W-87 modular cord, and building wire for each pair.
DATA RATES FOR DCP MODE 2
This arrangement operates at speeds up to and including 9.6 Kbps (the limit for modem pooling).
DCP MODE 2 FOR A 5ESS SWITCH
The System 75, System 85, DEFINITY Generic 1, Generic 2, Generic 3, and DIMENSION PBX systems
support the DCP interface. If the customer has an AUDIX system serving another switch and would like to
network the AUDIX system with another location, they could use an AT&T digital PBX for its DCP and
modem pooling capabilities. A picture of the DCP Mode 2 arrangement is shown along with a DCP Mode
3 arrangement in Chapter 6, DCP Mode 3 Networks — 64 Kbps.