Toshiba Strata DK 280 Installation Manual page 156

4.12 E & M Tie line Unit
(PEMU/REMU)
Each PEMU and REMU PCB provides four tie line
interface circuits. With DK280R3, tie lines can route
per Program 04 [DN] assignments or Program 71 and
72 DNISANI assignments (see Program 17). The
differences between the REMU and PEMU are noted
as follows:
n REMU tie lines may be individually configured with
Type 1 or Type 2 signaling. PEMU tie lines are
fixed at Type I signaling.
n The REMU 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 -3dB signal level drop to the
PBX or Central Office. The PEMU does not
provide these PAD switches.
*PAD is for Transmit and Receive for 2W
operation, and Transmit only is for 4W operation.
n
The REMU can be programmed for Wink or
Immediate Start signaling. The PEMUl is fixed for
Immediate Start signaling.
Both REMU and PEMU may be configured for either
2- or 4-wire transmission.
Note:
For the system to recognize the DTMF tones
generated by incoming tie lines, an RRCS
(-4, -8, or - 12) must be installed on the
RCTUA, RCTUB, RCTUBA or RCTUC/D.
RRCS is not required for REMLYPEMU dial
pulse operation (see Program 30, LED 1 I).
PEMUl controls, indicators, and interface connectors
are shown in Figure 4-28 and described in Table
4-20. REMU controls, indicators, and interface
connectors are shown in Figure 4-27 and described in
Table 4-21.
4.12.1
PEMU/REMU
Hardware Options
There are no hardware options supported by the
PEMU or
m3~w.
4.12.2 PEMU/REMU
Installation
Procedures
Install the PEMU or REMU in accordance with the
following steps:
1.
2.
3.
4.
5.
6.
7.
Remove the PCB from its protective packaging.
Determine if the E & M tie lines will be configured
for 2- or 4-wire transmission on PEMU. Set the
2W/4W jumper plugs P103, P203, P303, and
P403 to the appropriate positions on REMU set
SW103 m sw403.
For the PEMUl only: Set the FG jumper plug P3
to the "2-3" position. The REMU does not have
this jumper plug.
For the PEMU only: Set all GND/BAT jumper
plugs to the "BAT" position for connection to the
telephone network. The REMU does not have
these jumper plugs.
Note:
The "GND"position is used to connect PERU
circuits back-to-back on ,premises only, 1000
feet maximum (E & M lead wires must be
crossed).
For the REMU only: set the P102/104, P202/204,
P302/304, and P402/404 jumper plugs for Type 1
or Type 2 signaling. The PEMU is fixed at Type 1
signaling and does not have these jumper plugs.
For the REMU only: If the DK280 cabinets
(DKSUB280 and DKSUE280 or DKSUE424) are
within one mile of the PBX or Central Office, set
the REMU db PAD switches SW1 01, SW201,
SW301, and SW401 to the "3" (-3db signal level
drop) position. The PEMUl does not have these
switches.
Insert the REMU or PEMU into the appropriate
slot (refer to Subsection 4.1.2), and apply firm,
even pressure to ensure proper mating of
connectors.
IMPORTANT !
Each PEMU or REMU decreases the
maximum system CO line and Station Ports
by four each. See Worksheet 2 of
Chapter l-Configuration for recommended
REMU/PEMU slot assignments.
8. After installing the REMU or PEMU, gently pull it
outward. If the connectors are properly mated, a
slight resistance will be felt.
4-40
February 1996