PCB Installation

RDTU2 – T1 Interface Unit

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, 6-24and described in Table 6-16.

PEMU controls, indicators, and interface connectors are shown in Figure 6-25and 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.

6-32

Strata CTX I&M 06/04

Page 256
Image 256
Toshiba CTX28 manual RDTU2 T1 Interface Unit, REMU2A Tie Line Unit, REMU2A and Remu Installation, Pemu Installation