TB33 Ver 1.0
Using Externally powered Short Haul Modems with EK1000N
Page 2
© 2000 PAC International Ltd.
Short Haul Modem to Short Haul Modem
Controller Side
TxA
TxB
RxA
RxB
OR
RJ11
COS Side
RxA
RxB
TxA
TxB
RJ11
Network cable
Short Haul Modem to Data Switch
Note:
The SHM must have switch S1 set to DCE and switch S2 set to EN (both switches are
located in a recess on the underside of the modem).
Short Haul Modem
RX
TX
GND
DRT
CTS
Dataswitch
Ports 1 -
7
PIN 2
PIN 3
PIN 5
PIN 7
PIN 20
Dataswitch to PTSN Modem
Note:
For use with modems with 25-way connectors.
Dataswitch
Master Port
PIN 3
PIN 2
PIN 4
PIN 5
PIN 7
PIN 20
PTSN
Modem
PIN 3
PIN 2
PIN 4
PIN 5
PIN 7
PIN 20
