INTERNATIONAL LTD
TECHNICAL BULLETIN
PAC International Limited. 1 Park Gate Close, Bredbury, Stockport,SK6 2SZ, England
Tel: +44 (0) 161 406 3400. Fax: +44 (0) 161 430 8658
www.pac.co.uk
Using Externally powered Short Haul Modems with EK1000N
June 2000
TB33 Ver 1.0
Introduction
This Technical Bulletin describes how to connect an Easikey 1000N, with externally powered
short haul modems (SHM), to a PTSN modem via a COS dataswitch.
Product Tested:
Blackbox Powered Short Haul Modem (B Plus Async)
Product Code:
ME800AE Plus
Power is supplied to the SHM via a 17V 0.7A power supply.
System Configuration
EasiKey 1000-N
Short-haul modems
COS Dataswitch
PSTN Modem
Wiring Details
EK1000N to Short Haul Modem
Note:
The SHM requires a 25 way, male, D-type connector.
The SHM must have switch S1 set to DTE and switch S2 set to EN (both switches are
located in a recess on the underside of the modem).
EK1000N
RX
TX
GND
CTS
DRT
Short Haul
Modem
PIN 2
PIN 3
PIN 7
PIN 5
PIN 20
