(Mux 2) on Sunday, 30 November 2008. The stations were broadcasting on Mux 2 as part of a digital radio trial. RTÉ continues to broadcast on the RTÉ multiplex. ComReg and the BCI are currently exploring regulatory frameworks for digital radio multiplex licensing and broadcast licences. (DB Digital Broadcasting - 2012 to 2017) DB Digital Broadcasting launched a national multiplex in selected areas of Ireland in July 2012. Plans to expand to Limerick were dropped in 2014. The multiplex closed on 30 June 2017 after a lack of enthusiasm for DAB from the commercial sector and after its licence expired from ComReg. The operator is attempting to relaunch a national service after the announcement of the closure of the first national multiplex. Former trial multiplexes South-East (TOTAL-DAB) DAB trials (2010 to 2012) DAB and DAB+ trials were begun in April 2010 in the South-East area of Ireland on channel 9B (204.64 MHz) by Total Broadcast Consultants Ltd, a broadcast engineering company. The company initially obtained a 1-year test and trial licence from ComReg to perform tests from sites, initially just in Waterford City. But from mid May, the trial multiplex was expanded to cover much of the South East of Ireland via a high site in the Blackstairs Mountains, providing coverage in Co. Wexford, Co. Carlow, Co. Kilkenny and East Co. Waterford. In March 2011, a 1-year extension was granted. This was the first DAB multiplex in Ireland to be operated by an independent/private organisation (RTÉ NL operating previous multiplexes), and the first known broadcasts of DAB+ content in Ireland. In addition to all local and regional radio stations, it was carrying several stations previously unavailable in the region. Past trial participants have included Christmas FM, Zenith Classic Rock & Raidió Rí-Rá. 4fm, 160kbit/s Stereo Beat 102 103, 192kbit/s Stereo Sunshine, 128kbit/s Stereo KCLR 96FM, 48kbit/s DAB+ Stereo Phantom FM, 128kbit/s Stereo Radio Nova, 192kbit/s Stereo RTÉ 2XM, 72kbit/s DAB+ Stereo South East Radio, 88kbit/s DAB+ Stereo talkSPORT, 56kbit/s Mono Tipp FM, 56kbit/s DAB+ Stereo UCB Ireland, 32kbit/s AAC+ WLR FM, 64kbit/s AAC+ Stereo Dublin 2018 trial A test service in Dublin served parts of the city on Channels 5A and 5B carrying both RTE and Independent local radio services from both Dublin and Cork. Cork City 2018/19 DAB Trial (éirdab) A small scale DAB trial launched in August 2018 in Cork City, Ireland on channel 11A (216.928 MHz). It