Two-Wire Vf Orderwire Interface; Address; Data Orderwire Interface - Harris CONSTELLATION System Application Manual

System Interconnection

Two-Wire VF Orderwire Interface

Standard 2-wire telephone jack (RJ11).

Address

The DTMF receiver decoder can be set (using the Keypad) to any address
between 000 and 999. This feature is compatible with DVS II orderwire and
Megastar orderwire. The * key causes all stations to be called. The # key is not
used by the Constellation VF Orderwire but is used by the DVS II orderwire to
cancel the "all call" at the DVS II sites.

Data Orderwire Interface

Connector: RJ45
Maximum Distance: 50 feet (worst case)
One data channel provides two RS-232 ports.
Two RS-232 data ports can be selected to be bridged together providing half-
duplex communications or selected to be isolated providing full duplex in a
port-to-port application. Data can be set for sampling or asynchronous start-
stop data signals. When data is set for sampling, data rates up to 4800 bit/s can
be used with no restriction on the size of the data byte. When asynchronous
start-stop is selected, bit rates 9600 bit/s or 19.2 kbit/s are available with the
data byte set to 8 bits. A parity option can be enabled to send the parity bit
through the system. The system does not monitor the parity bit.
Harris Corporation
5-5
Constellation®