Selective Call - Selcall; Selcall Self Ids; Selcall Decode; Selcall Transmit - Barrett 4050 HF SDR Operating And Installation Manual

BARRETT 4050 HF SDR TRANSCEIVER - OPERATING AND INSTALLATION MANUAL

Selective Call - Selcall

Selcall (selective calling) is a digital signalling system based on the standard
CCIR-493 for use on HF networks. It is a type of squelch protocol used in
radio communications systems, in which transmissions include a brief burst of
sequential audio tones. Receivers that are set to respond to the transmitted
tone sequence will open their squelch, while others will remain muted.

Selcall Self IDs

Each station in an HF network can be assigned up to 14 different Self IDs of
can be called using any of these Self IDs.

Selcall Decode

The Transceiver has the ability to decode both OEM and International Selcalls
on any channel programmed as a Selcall channel. However, the call must be
addressed to the relevant ID (OEM or International).
Calls for each format type will only be decoded if there is at least one Self ID of
that format programmed into the Transceiver Self ID group.

Selcall Transmit

programmed for the channel are permitted. This means International and CCIR
format calls can only be sent on channels that are programmed as International
or CCIR Selcall channels. OEM calls can only be sent on channels that are pro-
grammed as OEM Selcall channels.

Selective Call - Telcall

Telcall uses this digital Selective Call system to send a telephone number from a
station on an HF network to a base station equipped with a telephone inter-
connect unit to initiate phone calls onto the PSTN.
the Selcall or Telcall option and the channels enabled for Selcall operation.
If Automatic Link establishment (ALE) is in use, refer to the Automatic Link
Establishment (ALE) section on page 100.
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