Difference between revisions of "UniTrunker"

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Public Alpha - released July 28, 2008 (Version
Public Alpha - released October 2008 (Version

Revision as of 23:23, 11 January 2009

Unitrunker Screenshot monitoring a Motorola system


UniTrunker supports control channel monitoring for the following trunking types:

UniTrunker also supports downloading system information from the Web Service.

UniTrunker generally does not currently support Passport or MultiNet. LTR support is limited to operation with a PSR-500 or PSR-600.

UniTrunker cannot monitor or decode conventional P25 data or audio.

What Can UniTrunker Display?

  • Basic system information - system type, system id, talkgroups, and radio ids.
  • Basic site information - site or cell number, and list of channels.
  • Site call activity - who's talking, on what channel, and to whom.
  • Neighboring Site information - list adjacent cell or sites with control channels.
  • User roaming - what radios are registed to a particular site.
  • User affiliation - what talkgroup a user has requested.
  • Patches - a dispatcher initiated action that joins two or more talkgroups together.

This program replaces a previous generation of UniTrunker (Retro).


Public Alpha - released October 2008 (Version

What are the Call Types available?

Colum "T" = "Type" which would be [G]roup or [I]individual (iCall)

Colum "CT" = "Call Type" - See below

For EDACS systems:

Fon - Telephone call

Tst - LCN tester

Dat - Data call

Ana - Analog Voice Call

Emg - Emergency Analog Voice Call

Dig - Digital (ProVoice or Aegis) Voice Call

EmD - Emergency Digital Voice Call

For Motorola:

(Note that these follow the TG+n values in order.)

(none) - Analog voice call

All - All talkgroup (analog)

Em - Emergency (analog)

XP - Crosspatch (analog)

EXP - Emergency Cross Patch (analog)

EMS - Emergency Multiselect (analog)

? - Reserved

MS - Multi Select (analog)

Dig - Digital voice call

DAT - Digital All Talkgroup

DEm - Digital Emergency

DXP - Digital Crosspatch

DEX - Digital Emergency Crosspatch

DEM - Digital Emergency Multiselect

? - Reserved

DMS - Digital Multi-select

For P25 systems:

P25 call type is the call's priority - a single digit from 1 to 7. "4" is the default normal priority.

Emergency calls prefix this digit with the letter "E".

Frequently Asked Questions

Q: Do I need a radio with discriminator tap?

A: The short answer - Yes. The long answer - You may be able to decode 3600 baud Motorola control channels with a 50-70% decode rate without a discriminator tap. This is totally dependent upon the scanner/receiver and sound card you are using. You will not be able to decode EDACS, or APCO Project 25 without a discriminator tap. MPT1327 is the exception. It generally decodes equally well with speaker audio or discriminator audio. With the GRE PSR-500 and PSR-600 you do not need a discriminator tap; the program reads through a USB cable attached to the radios' PC/IF port. UniTrunker has support for EDACS, Motorola and P25 systems with the PSR500/600.

Q: Do I need a slicer?

A: No.

Q: Will this work on Windows? If so, what version?

A: Yes - Windows 95 (with IE4 or later), Windows 98, ME, 2K, and XP (all flavors).

Q: What types of trunked radio systems can I monitor?

A: APCO Project 25, EDACS, LTR (with supported radio), Motorola, and MPT1327.

Q: How can I use this to listen to calls on a trunked radio system?

A: You need a second radio that accepts computer control to tune to voice calls as they occur.

Q: Does the program permit downloading talkgroup information from the Web Service?

A: Yes - you can download Motorola and APCO P25 systems by trunking system ID. You can download EDACS by looking up the RR DB SID (that's the ID # assigned by the database to each trunked system). You must be a paid member with a valid user id for this feature.

Q: Can I import my trunker data files?

A: Yes - read the Hints section of the documentation that describes how to do this.

Q: How much does it cost?

A: Nothing. As long as you follow the license and copyright notice - the program is free. No registration either.

See also