Toshiba Strara CTX Series, Installation And Maintenance Manual, Page: 143 / 290

PCB Installation
4-21
Strata CTX I&M September 2002
REMU2A – Tie Line Unit
Circuits per PCB:
four Tie line circuits
Interfaces with:
E&M Tie lines
2- or 4-wire transmission
Older Version(s):
PEMU
The REMU2A has four decibel (dB) Pad switches which can be set to reduce excessive loudness
resulting from close proximity to an Exchange Line or PBX by providing a -3 dB signal level drop to
the PBX or Exchange Line. (Pad is for Transmit and Receive for 2W operation, and Transmit only is
for 4W operation.)
REMU2A and REMU controls, indicators, and interface connectors are shown in Figures 4-16 , 4-17
and described in Table 4-11 .
PEMU controls, indicators, and interface connectors are shown in Figure 4-18 and described in Table
4-12 .
REMU2A Installation
1. Set the 2W/4W jumper plugs SW103~SW403 to the appropriate positions.
2. If the system is located within 1.61km (one mile) of the PBX or Exchange Line, set the REMU dB
Pad switches SW101, SW201, SW301, and SW401 to the 3 (-3 dB signal level drop) position.
3. Make sure the jumper plugs for P105, P205, P305 and P405 are set to the TYP1,2 (default), unless
the unit is used in the U.K. or Japan, in which case the plug should be moved to DC5.
4. Ensure the position of the jumper plug on P2 selects A Law.
5. Insert the REMU (component side facing right) into the appropriate slot and apply firm, even
pressure to ensure proper mating of connectors.
6. After installing the REMU, gently pull it outward. If the connectors are properly mated, a slight
resistance is felt.
PEMU Installation
1. Determine if the E&M Tie lines will be configured for 2- or 4-wire transmission.
2. Set the 2W/4W jumper plugs P103, P203, P303, and P403 to the appropriate positions.
3. Set the FG jumper plug P3 to the “2-3” position.
4. Set all GND/BAT jumper plugs to the “BAT” position for connection to the telephone network.
5. Insert the PEMU (component side facing right) into the appropriate slot and apply firm, even
pressure to ensure proper mating of connectors.)
6. After installing, gently pull the PEMU outward. If the connectors are properly mated, a slight
resistance is felt.