Northern Telecom NAC Installation Manual page 65

3-40 Hardware installation
Each cable has a single male DB-25 plug at one end, and three female
DB-25 plugs at the other end. The single DB-25 plug connects to a DB-25
socket in the I/O connector panel (see Figure 3-11). Each of the three
DB-25 plugs at the other end are connected to a peripheral device. Refer to
the correct port assignment chart when connecting peripherals to cables.
An RS-232 straight-through cable with male DB-25 connectors can extend
the range between a NAC and a peripheral device. The RS-232 must be less
than 42 feet long, and must use all 25 pins. For greater distances, refer to
the "Peripheral devices" chapter, "Modems overview" section.
Table 3-7 is the wiring table for the multiport cable. The pins listed in the
"From" column represent pins in the plug which connect to the I/O
connector panel. Pins listed in the "To" column are pins in the DB-25
sockets for the cables listed in the "Cable" column.
553-4011-110 Standard 1.0 November 1994