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George Hopkins edited this page Dec 21, 2015 · 9 revisions

Feature List

This page list the features of the SvxLink server and Qtel. It is a quick way to understand what the applications can be used for.

The SvxLink Server

These are the most important features of the SvxLink server application.

  • Can act as a repeater controller or just operate on a simplex channel

  • Plugin based system to load voice services into the SvxLink logic core

  • DTMF controlled using a high performance software DTMF decoder or hardware based one

  • DTMF anti-flutter mode to suppress multiple digit detection when mobile flutter is present or during weak-signal conditions

  • A sound clip based system for announcements

  • Periodic identification

  • A script based (TCL) event handling system

  • Possible to use left/right stereo channels as two mono channels

  • Roger beep

  • Trigger manual identification by pressing DTMF *

  • A simple shortcut, or macro, subsystem

  • Support for RTL2832U based DVB-T USB dongles for use as SDR (Software defined Radio) receivers

  • Repeater logic specific features:

    • Multiple repeater activation modes: 1750 Hz tone burst, CTCSS, DTMF or squelch open.

    • The repeater can be configured to activate again on just squelch open directly after close.

    • Periodic "idle sound" when the repeater is up but no signal is being received

    • Announcements are mixed in with normal audio

    • The volume of announcements is lowered if there are other traffic

    • Remind users to identify themselves if they don’t

  • Possible to define multiple logic cores to connect to multiple transceivers

  • Possible to link logic cores together

  • Support for multiple receivers using a software voter

  • Remote receivers can be linked to the logic core via TCP/IP(Internet)

  • Remote transmitters can be linked to the logic core via TCP/IP (Internet)

  • Multiple squelch detectors: Vox, CTCSS, signal level, evdev (/dev/input/) and external (through serial port pin)

  • Multi tone signalling to transmit signal strength measurements from a remote RX site that is linked in through RF.

  • Digital deemphasis/preemphasis filter

  • DTMF muting

  • Squelch tail elimination

  • Flexible CTCSS transmit. A tone can be configured to be transmitted always or on specific events like when the squelch is open, another logic core transmits, a module transmits and/or when an announcement is being played.

  • A QSO recorder feature to record QSO:s to WAV-files.

  • Possible to control SvxLink using selective calling (SelCall) codes in addition to DTMF commands.

  • A simple help system module

  • A parrot module that retransmit received audio

  • An EchoLink module used to connect to other EchoLink nodes

    • Idle timeout

    • A callsign lookup/connect by callsign function

    • List connected stations on demand

    • Own node id report function

    • Random connect to link, repeater or conference

    • Reconnect to last disconnected node

    • Listen only mode

    • APRS node info announcement support

    • If two SvxLink nodes connect, a better audio codec, Speex, is used instead of the GSM codec. This will provide much improved audio quality.

    • Possible to limit both incoming and outgoing connections to specified stations using regular expressions

    • EchoLink Proxy support

  • A Free Radio Network module

    • Count connected clients

    • Listen-only mode

  • A voice mail module

    • Record voice mail for local users

  • A DTMF repeater module that retransmits received DTMF digits.

    • Control other DTMF controlled stations on the same frequency

  • A selective calling encoder module that use DTMF commands to make SvxLink send out selective calling sequences.

  • Possible to write new modules in the TCL scripting language

Qtel - The Qt EchoLink Client

These are the most important features of the Qtel application.

  • Graphical EchoLink client application

  • Use the Qt widget toolkit

  • The EchoLink station list is divided into Conferences, Links, Repeaters and Stations

  • A bookmark system

  • Support for multiple languages (English, Swedish, German, Spanish, Ukranian, Russian, Hungarian, Japanese, French and Italian at the moment)

  • VOX

  • When connecting to a SvxLink node through EchoLink, a better audio codec, Speex, is used. This provides a much improved audio quality.

  • EchoLink Proxy support

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