Introduction GPRS-136 is the packet data service provided in TIA/EIA-136 (also known as UWC-136). A general description of the System Architecture and Protocol Descriptions is provided in TIA/EIA-136-330. To provide high data rates@ GPRS-136 uses a 200 kHz channel@ also known as a 136HS Outdoor bearer. The upper layers of the GPRS-136 protocol stack are common throughout UWC-136@ applying to each individual bearer (136+@ 136HS Outdoor@ and 136HS Indoor). This document provides an Overview of the 136HS Outdoor bearer@ configured as a packet traffic channel (PTCH)@ for GPRS-136. An RLC/MAC entity for the 136HS Outdoor bearer is specified in TIA/EIA-136-342 and a Physical Layer is specified in TIA/EIA-136-341.