Telebyte 209 Short Haul Modem
Unit 17 Park Farm Industrial Estate
01850-001 Rev. G
Buntingford, Herts SG9 9AZ UK
TEL: + 44 (0) 1763 273 243 FAX: + 44 (0) 1763 274 106
Web: www.kerisys.com E-mail: [email protected]
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Short Haul Modem
Quick S
tart Guide
2.3
Connecting to the Host Computer - DB-9 to DB-9
If the host computer's COM port uses a male DB-9 connector the short haul modem can be
plugged directly to the COM port (see Figure 2). Set the switch on the short haul modem to the
DCE position by gently turning the switch completely counter-clockwise.
Figure 3: Host Computer to Short Haul Modem Connection
2.4
Connecting to the Host Computer - DB-9 to DB-25
If the host computer's COM port uses a DB-25 connector a DB-25 to DB-9 reduction plug must
be used.
2.4.1
Using a "Straight-Through" Reduction Plug
If the reduction plug uses straight-through wiring (pins 2 and 3 on the 25 pin side go straight
through to pins 2 and 3 on the 9 pin side) make the connection as shown in Figure 3. Set the
switch on the modem to the DTE position by gently turning the switch completely clockwise.
Figure 4: Host Computer to Short Haul Modem Connection Straight–Through Reduction
Plug
