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S:\HP83206A\USRGUIDE\MANUAL\is136bas.fm
Chapter 10, TIA/EIA-136 Basics
Basic Functions of the DCCH in TIA/EIA-136
Call Release During conversation mode, either party can terminate the call. On a mobile, this
can be done by either pressing ‘END’ or by merely turning power off. When the
mobile user terminates the call, the base station smoothly disconnects from the
mobile.
Mobile releases call
1. Mobile sends a release message
2. Mobile terminates Conversation mode
3. Base station sends acknowledge message
4. Mobile enters Serving System Determination task
Base releases call
1. Base sends a release message
2. Mobile sends an acknowledge message
3. Mobile terminates Conversation mode
4. Base station sends acknowledge message
5. Mobile enters Serving System Determination task
Time Alignment
and Other Orders
There are many features of TIA/EIA-136 that can be used to maintain or update
information within the system. Some of these are described below.
• Time Alignment. Once on a DTC, the base station can adjust the time alignment of the
mobile’s transmissions. This modifies the timing of the data within the mobile’s
assigned time slot.
• Message Waiting Indicator. The base can notify the mobile and indicate the number of
messages that are waiting.
• Calling Number Identification. This is sent from the base to the mobile, indicating the
number of the phone which is trying to contact the mobile.
• Distinctive Ring. The base can define the type of sound the mobile produces when it is
called. The base can choose medium, high, or low pitch. It can also select the period of
the signal. This can be several combinations of long, short, PBX, or PIP (very short).
Registration and
Periodic
Registration
Registration is the process by which the mobile identifies itself to the base.
Periodic registration is a way to remind the base station that the mobile is still in
the area. It is used when the mobile wants to conserve battery power.
The basic procedure for registration is described below.
1. Base requests the mobile to register. A parameter on the DCCH broadcast message
identifies how the mobile is to respond. Typically the base station tells the mobile
station to register and include the Capability Report and the Serial Number messages.
2. Mobile responds with a registration message which corresponds to the required
parameters.