The iDEN network was originally deployed as a dispatch radio service .
Is unique in blending the half - duplex push - to - talk one - to - many broadcast capability of a walkie - talkie with the one - to - one private communication of a phone .
The iDEN network was originally deployed as a dispatch radio service and is unique in blending the half - duplex push - to - talk one - to - many broadcast capability of a walkie - talkie with the one - to - one private communication of a phone .