TIA/EIA-603-D is a Recommended Standard developed and maintained by the TR-8 Committeeon Private Radio Systems and its subcommittees under the sponsorship of theTelecommunications Industry Association. This Standard represents the consensus of theformulating subcommittees at the time of publication.This Standard replaces TIA/EIA-603-C, which was originally published in December 2004.Technical updates include changes to reflect the latest frequency assignments by the FCC andNTIA.There are two Annexes in the document. Both Annex A and Annex B are informative, and arenot considered part of this Standard.