Panasonic KX-TD1232E, Installation Manual

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2-42 Installation
The ISDN S0 bus on the KX-TD280, KX-TD281 and KX-TD282,
whose ROM numbers are P071D or later ROM versions and on the
KX-TD286 can be used as internal S0 bus. The Port numbers 01
and 02 of the KX-TD281 are fixed as external ISDN S0 Lines. The
others can be used as either external or internal ISDN S0 Lines.
Some System Programmings and hardware changes are required to
use the S0 bus as internal ISDN S0 lines beforehand.
Preparation
For KX-TD281 only
1. Take the appropriate jumper cover out of the first and second
pins from the left on the jumper of the P-board (“S0” side).
Jumper 1 for Port number 03
Jumper 2 for Port number 04
2. Cover the jumper cover on the first and second pins from the
right on the jumper of the P-board (“EXT” side).
Connection
Use 4-pin plugs (included) to connect ISDN S0 lines. A single plug
is able to connect one ISDN S0 line. Mis-connection may cause the
system to operate improperly.
1. Re-arrange telephone wires in reverse order of the plug.
2.4.7 Internal ISDN S0 Line Connection
S
O
E
X
T
S
O
E
X
T
D
IP
SO E XT
SO E XT
Jumper 1
Jumper 2
Wiring for external ISDN S0 line
Wiring for internal ISDN S0 line
←
From Network To the unit
←
TB
TA
RA
RB
RB
RA
TA
TB
←
From Terminal
Equipment
To the unit
←
TB
TA
RA
RB
RB
RA
TA
TB
1
2