4.3 CONNECTING TO THE DATA PORT
The VDQM universal interface data interface is configured as DCE
(Data Circuit-Terminating Equipment). It may be configured to
transmit/recieve V.35, EIA-232 or EIA-422 electrical signals by
appropriately setting switches S1 and S2 (See Section 3.2).
As a DCE, the High Density 26 pin data port is designed to connect
directly to DTE (Data Termination Equipment), such as a router. Refer
to the pin assignments in Appendix C to construct a cable to connect
your DTE or DCE equipment. You may also purchase a connecting
cable directly from cable from Patton Electronics.
4.4 CONNECTING TO AC OR DC POWER
Instructions for connecting the power supply Universal Interface
AC Power Supply and DC Power Supply option) are contained within
the base unit user manual. Please refer to the base unit manual for
connection details.
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5.0 OPERATION
Once the VDQM is installed, it should operate transparently. This
sections describes FXS and FXO power-up, and general operating
instructions.
5.1 GENERAL OPERATING INSTRUCTIONS
Both voice ports utilize a Data Access Arrangement (DAA) to
interface with the telephone line. Both ports also utilize an ADPCM
CODEC to convert the voice to digital information.
The FXS configuration (Model IM1/JS) has the capability to
generate battery voltage and ring signal. The battery voltage in the
"On-Hook" condition will be 47 V +/- 10%. In the "Off-Hook condition
the circuit will supply the required current which meets the country of
installation's V/I curve in accordance with NET- 4.
The ring signal has the capability to drive a 1 REN load. This
capability will typically allow for one phone and an extension to be
connected on a single port or to a single phone with a line length up to
1700 feet since most phones have a REN less than 1. This will allow
the unit to be placed in a phone closet if desired, as opposed to sitting
on a desk.
Dialing from an FXS port to an FXO port is accomplished via the
voice channel. DTMF digits generated by the phone connected to an
FXS port are transmitted to the FXO port. Dial Pulse dialing is not
permitted. Dialing between two FXS ports is not required.
