User Guide

PCB Installation
RDTU2 – T1 Interface Unit
6-32 Strata CTX I&M 06/04
RDTU2 – T1 Interface Unit
See Chapter 8 – T1 for RDTU PCB installation information.
REMU2A – Tie Line Unit
Circuits per PCB: four Tie line circuits
Interfaces with: E&M Tie lines
2- or 4-wire transmission
Type I and II Signaling
Immediate and Wink Start
Older Version(s): REMU1 (Does not have Mu Law/A Law jumper plug)
PEMU (Type I signaling & immediate start only,
does not provide Pad switches)
The REMU2A has four decibel (dB) Pad switches which can be set to reduce excessive loudness
resulting from close proximity to a central office or PBX by providing a -3 dB signal level drop to
the PBX or central office. (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 6-23,
6-24 and described in Table 6-16.
PEMU controls, indicators, and interface connectors are shown in Figure 6-25 and described in
Table 6-17.
REMU2A and REMU Installation
1. Set the 2W/4W jumper plugs SW103~SW403 to the appropriate positions.
2. Set the P102/104, P202/204, P302/304, and P402/404 jumper plugs for Type 1 or Type 2
signaling.
3. If the system is located within one mile of the PBX or central office, set the REMU dB Pad
switches SW101, SW201, SW301, and SW401 to the 3 (-3 dB signal level drop) position.
4. (REMU2A only) 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.
5. (REMU2A only) Do not change the position of the jumper plug on P2 selects Mu Law
(default). However, if the unit is used in Mexico, the U.K, or Asia, move the jumper plug to A
Law.
6. Insert the REMU (component side facing right) into the appropriate slot and apply firm, even
pressure to ensure proper mating of connectors.
7. 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.