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Chapter 5, Programming the Cellular Adapter
FACCH and SACCH programming
Programming the Cellular
Adapter
FACCH and SACCH programming
This function can only be controlled through HP-IB. FACCH and SACCH have
no equivalent display fields.
FACCH and
SACCH description
The Reverse Digital Traffic Channel (RDTC) is a digital channel from the mobile
to the base. It contains information about topics like connection, measurement
orders, channel quality, DTMF, status, and SSD updates.
The RDTC has two separate control channels: Fast Associated Control Channel
(FACCH), and Slow Associated Control Channel (SACCH). These are the two
channels which can be programmed with messages.
The FACCH replaces the user information block whenever it is to be transmitted.
The FACCH can consist of more than one word. User information blocks can be
interspersed with the FACCH words.
The SACCH uses 12 coded bits per TDMA burst. This data stream is continuous.
Programming
commands for
FACCH and
SACCH
HP-IB commands for the FACCH and SACCH follow.