
5-12 Modems
553-4001-111 Standard 1.0 March 1997
The first Gandalf LDS 120E or Develcon DS 511A modem is connected to
the second Gandalf LDS 120E or Develcon DS 511A modem with a 2-pair
twisted cable of 24 AWG. This cable cannot exceed eight km (five miles).
For the Develcon DS 511A modem, the cover casing must be removed
before connecting the 2-pair twisted cable.
Figures 5-3 and 5-4 illustrate the 2-pair twisted cable connections for the
two modems with an SNN/SNN-E. Figures 5-5 and 5-6 illustrate the 2-pair
twisted cable connections for the two modems with an IPE/IPE-E system.
If the peripheral device is a female DTE connection, the second Gandalf
LDS 120E or Develcon DS 511A modem is connected to the peripheral by
using a straight-through NT1R03Dx cable. If the peripheral device is a
male DTE connection, the second Gandalf LDS 120E or Develcon DS
511A modem is connected to the peripheral by using a straight-through
NT1R03Ex cable.
If the peripheral device is DCE, the modem is connected to the peripheral
device by the null modem cable NT7D99AA.
If the peripheral device is DTE, the second Gandalf LDS 120E or Develcon
DS 511A modem is connected to the peripheral by using a straight-through
NT1R03Dx cable.
A male DB-25 connector is attached to the second Gandalf LDS 120E
modem or Develcon DS 511A modem’s female DB-25 socket, and the
appropriate DB-25 connector is attached to the peripheral.
The following settings are necessary for the Gandalf LDS 120E modem to
be used:
• Termination: T (330 OHM)
• Internal Jumper Plugs: 4
-wire mode, J13-J14 connected and J15-J16
connected
• Front Panel Push-button Switches: ALL OUT - TP - RL - DL - AL
Kommentare zu diesen Handbüchern