Modular Wiring - Equinox Systems MEGAPORT Hardware Reference Manual

Modular Wiring

LD Modular Splitter
Modular splitters are used with modular adaptors and modular cable.
Modular splitters convert the 50-pin telco connector to a set of 12
modular jacks. Figure 4-7 illustrates devices connected to the
MEGAPORT board using the modular splitter.
The LD modular splitter (Equinox part number 210117)
converts the signals on the 50-pin connector to 12 RJ-11
modular jacks. This splitter must be used to connect to LD
ports. A CS version of the modular splitter (Equinox part
number 210016) is available for connecting devices to CS
ports. Two modular splitters are required to connect 24
devices to one MEGAPORT board. The modular splitter is
wired as shown in Figure 4-8.
Only 4 wires are used, so either 4- or 6-wire modular cable
may be used to attach devices to the splitter. When user
supplied modular cable is used, make sure the cable is
reversing. Standard telephone cords are made this way and
can be used for this application.
Modular adaptors convert modular plugs at the end of
modular cables to DB-25 RS-232 connectors. One adaptor is
required for each device to be connected. The adaptors for
MEGAPORT LD boards are the same as for CS boards.
Connecting Devices to LD Ports
LD Modular Splitter (PN
210117)
50-pair PBX
extension cables
for long distance
Figure 4-7. LD modular splitter.
Modular
adaptor or
LDA-232
Two-twisted-pair cable
OR Modular cable for
up to 50 feet
49