The option is being seriously considered now that telecommunication companies have rejected mobile phone blockers, also known as "cell phone jammers", because they could interfere with suburban phone communication outside the jail, including police and emergency service operations.
Corrective Services director Robert Williams recently said the change in focus was driven by the telcos' opposition to phone jammers being trialled at the Lithgow Correctional Centre in NSW.
"For the last couple of years the technology group has been looking at mobile phone jamming and increasingly that is becoming very difficult," Mr Williams said.
"The telcos do not seem so keen on it and we have been having a lot of difficulty getting the regulations to trial it.
"What we are starting to look at now as a national group is mobile phone detection devices because there are problems, especially where prisons are in built-up areas, where telcos have legitimate concerns about interfering with emergency services and things like that.
"What the national group is doing is looking at what alternatives are available.
"There are some possibilities for retro-fitting, it comes at a cost, prison cells with detectors so you can actually locate them by detecting rather than by jamming.
"All of this comes at great expense."
About 50 mobile phones and accessories were seized from within Tasmanian prisons over the past three years.
A mobile phone jammer typically prevents the mobile phone from receiving signals from base stations.
Companies such as Netline offer products such as the C-Guard Hammer, involving a "cellular phone detection and jamming system, to control, detect, block and prevent use of unauthorised smuggled cell phones in prisons".
EDITORIAL, Page 28.
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