There are two multiplex networks in Northern Ireland.

* BBC National Multiplex, Channel 12B
* Score Digital Northern Ireland, Channel 12D

Further expansion of networks in Northern Ireland is currently restricted with the Irish Republic continuing to use VHF Band III for analogue television.

The BBC were the first to set up a DAB transmitter in Northern Ireland in 1999 at Divis Mountain, but Score Digital NI were the first to give coverage that extended across much of Northern Ireland. Their network came on in early September 2001. During 2005 the BBC opened up new DAB transmitters in the west to expand their coverage.

BBC National Multiplex (Chanel 12B)

(Transmitter, Maximum Vertical Effective Radiated Power)

* Brougher Mountain, 3.2kW
* Divis, 10kW
* Limavady, 6.3kW
* L/Derry, 6.2kW

Primary Services

* BBC Radio 1 (Joint Stereo 128kbps)
* BBC Radio 2 (Joint Stereo 128kbps)
* BBC Radio 3 (Stereo 192kbps or Joint Stereo 128kbps)
* BBC Radio 4 (Joint Stereo 128kbps or Mono 80kbps)
* BBC Radio 5 Live (Mono 80kbps)
* BBC 6 Music (Joint Stereo 128kbps)
* BBC 7 (Mono 80kbps)
* BBC 1Xtra (Joint Stereo 128kbps)
* BBC World Service (Mono 80kbps or 64kbps)
* BBC Asian Network (Mono 80kbps or 64kbps)

Secondary Services (These are only available when a programme is being broadcast)

* Daily Service (Mono 64kbps)
* Parliament (Mono 64kbps)
* BBC 5 Live Sports Extra (Mono 80kbps)

Score Digital Northern Ireland (Channel 12D)

(Transmitter, Maximum Vertical Effective Radiated Power)

* Black Mountain, 7kW
* Brougher Mountain, 4.35kW
* Colinward, 500w
* Limavady, 6.2kW
* L/Derry, 5kW
* Strabane, 5kW

Primary Services

* 3C Country (Joint Stereo 128kbps)
* BBC Radio Ulster (Joint Stereo 128kbps)
* Citybeat (Joint Stereo 128kbps)
* Classic FM (Joint Stereo 128kbps)
* Cool FM (Joint Stereo 128kbps)
* Downtown (Joint Stereo 128kbps)
* Kiss 100 London (Joint Stereo 128kbps)
* Prime Time Radio (Mono, 96kbps)
* Q102.9 (Joint Stereo 128kbps)

Originally posted by Northern Correspondant on ICDG Wiki.