264 Using The Analog Call Processing Subsystem; Description Of The Analog Call Processing Subsystem - HP 8924C Application Manual

Chapter 9, 264 Using the Analog Call Processing Subsystem

Description of the Analog Call Processing Subsystem

Description of the Analog Call Processing Subsystem
264
The Analog Call Processing Subsystem, which comprises six call processing
screens, simulates an analog cellular base station. The Analog Call Processing
Subsystem provides, through host firmware control, the specific signals and
protocol messages necessary to automatically establish and maintain a cellular
link between the Test Set (simulated base station) and a cellular phone (mobile
station).
Once the link is established the operator can exercise the call processing
functionality of the mobile station, such as
• decoding orders from the base station, such as orders to retune the transceiver to a new
channel, to alert the mobile station user to an incoming call, to adjust the transceiver
output power level, or to release the mobile station upon completion of a call.
• encoding signaling information for transmission to the base station, such as dialed
digits for call origination, disconnect signal at the completion of a call, or mobile
identification number.
In addition to exercising the mobile station's call processing functions, the Test
Set automatically
• measures some of the basic RF characteristics of the mobile station's transmitted
carrier, such as; transmitter power, frequency accuracy and modulation deviation
• decodes and displays various reverse control channel and reverse voice channel
signaling messages
For forward control channel and forward voice channel signaling messages, the
operator has the option of sending messages whose contents are built using the
rules and regulations specified in the applicable industry standard, or the operator
can define the message contents as desired. Having the capability to set the bit
patterns of the signaling messages sent to the mobile station gives the operator the
capability to test the robustness of the mobile station by introducing known errors
into the signaling message.
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