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Chapter 10, TIA/EIA-136 Basics
Basic Functions of the DCCH in TIA/EIA-136
TIA/EIAa TIA/EIA-136 Basics
Camping Mode
This is the mode in which the mobile waits for orders, or originates a call. This is
analogous to Idle mode in an analog system.
Origination Message
The mobile transmits an Origination Message after confirming that the channel is
accessible by monitoring the Overload control.The Origination Message is
transmitted on the RACH (Random Access Channel). This message contains
information such as that listed below.
• called party number
• whether it is an emergency call or not
• voice mode
• data mode
Channel Designation
This assigns the RF channel of the traffic (or voice) channel. Some information
included in this message is listed below.
• traffic channel number
• voice mode (defaults to VSELP voice coder and No Voice privacy)
• DMAC (Digital Mobile Attenuation Code) assigns mobile power level
• Assigned Time Slot (ATS)
• time alignment
Registration Update
The mobile receives and updates the SID (System Identification) and the
registration period parameters.
Confirm Initial Traffic Channel
The mobile tunes to the assigned RF channel, sets DVCC, DMAC, time slot
assignment, and Base Station Protocol Version status.
Conversation Mode
The user can begin the conversation.