16
V.35 SYNC MODEM ELIMINATOR
4. Installation and Operation
Once the V.35 Synchronous Modem Eliminator is properly configured,
installation and operation are very simple. The V.35 SME draws all necessary
operating power from the V.35 interface, so it doesn’t need AC or battery
power. There is no ON/OFF switch; just like a cable, the unit should operate
transparently and continuously when the connected devices are turned ON
and communicating. To install the unit, take these steps:
1. Turn OFF the host (DTE) devices to which the V.35 SME is to be
connected.
2. If either of the host devices has a M/34 male V.35 port, you can plug the
V.35 SME directly into that device. Then connect the V.35 SME to the
other host device using a multipair cable. (If neither device has an M/34
male V.35 port, you’ll have to run multipair cable to both devices.) The
total cable length between the two devices must not exceed 300 feet
(91.4 m). Refer to Figure 4-1 below.
Remember that if one of the devices (rather than the V.35 SME) will be
supplying the clock signal, you need to orient the V.35 SME so that the
device configured for external clock is connected to Port A and the
device configured for recovered clock is connected to Port B.
Figure 4-1. A typical installation.
Sync Host A
(System can use clock from V.35 SME or Host A, but not from Host B.)
Port A
150 ft.
(45.7 m)
284 ft. (86.5 m)
134 ft.
(40.8 m)
Port B
V.35 SYNC MODEM
ELIMINATOR
(ME243A-F)
Sync Host B
