Equinox Systems MEGAPORT Hardware Reference Manual page 57

Modular Cables
RJ-11 modular cable is the flat cable used for wiring telephones inside
of buildings. The cable is terminated at each end with an RJ-11
modular plug (connector) which is inserted into the modular jack of
an appropriate wiring module. Standard modular cables available
from Equinox or wiring distributors are reversing; that is the pins are
reversed on each end (so that pin 1 on one end is connected to pin 6 on
the opposite end, etc.). Figure 4-9 illustrates the signals passed
through modular cables when connected to a LD port using the
Equinox part number 210117 LD modular splitter.
Modular Adaptors
Modular adaptors convert modular jacks to DB-25 (RS-232) connec-
tors. The following list describes the modular adaptors available from
Equinox. This list may be used to determine the correct modular
wiring required for system installation
Part No.
210036
210037
210026
210027
210038
Note: Although modems can be connected to LD boards, it is not
recommended because LD boards do not support control signals.
Connecting Devices to LD Ports
Figure 4-9. LD Modular cable signals.
Connector
DB-25 DCE male
DB-25 DCE female
DB-25 DTE male
DB-25 DTE female
DB-9 female
Connect To
terminals or ports (female DTE )
terminals, ports, IBM PC, XT, PS/2 (male DTE )
modems or multiplexer channels (female DCE)
Male DCE devices (non-standard devices)
IBM PC AT serial port
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