
Preliminary Data Sheet
T7230A Primary Access Framer/Controller
June 1997
82
Lucent Technologies Inc.
Register Structure
(continued)
Parameter/Control Registers
(continued)
Automatic Transmission Enable Register (PR2)
Table 57. Automatic Transmission Enable Register (PR2)
On-Demand Transmit Register 1 (PR3)
Table 58. On-Demand Register 1 Bits Decoding
Bits
0
1
2
Description
Automatic A Bit on LFA (AALFA).
A 1 transmits A = 1 to the line whenever the receive framer detects LFA.
Automatic A Bit on LMFA (AALMFA).
A 1 transmits A = 1 to the line whenever the receive framer detects LMFA.
Automatic Receive Channel Squelch (ARCHSQ).
A 1 enables the automatic transmission of AIS to the system
interface (DXA, DXB) when in the LFA state. CEPT only.
Automatic Receive Signaling Squelch (ARSGSQ).
A 1 enables squelching of time slot 16 signaling data with the
alarm indication signal (all ones) during loss of time slot 16 signaling multiframe alignment state.
Automatic Line Loopback Enable (ALLBE).
A 1 enables the framer section to execute the line loopback on or off
commands without system intervention.
Enable ITU G.826 Mode.
A 1 enables the G.826 performance monitoring mode.
Enable CRC-4 100 ms Timer.
A 1 enables the CRC-4 multiframe alignment algorithm with 100 ms timer in CEPT.
Enable CRC-4 400 ms Timer.
A 1 enables the CRC-4 multiframe interworking alignment algorithm and 400 ms
timer in CEPT.
3
4
5
6
7
Transmit Signal
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
X
X
X
X
X
X
X
X
Transmit Remote Frame Alarm.
Transmit Japanese Remote Frame Alarm.
CEPT: Transmit NOT FAS time slot in all every time slot 0 of the trans-
mit system framers. (Duplicate NOT FAS time slot 0 data.)
Transmit Remote Multiframe Alarm (CEPT-only).
Transmit Facility Data Link AIS.
Transmit Squelch Code (PR5) in all Transmit Line Interface Time
Slots.
In the DDS modes, transmit the unconnected code (UC = 00011000) in
transmit line slots 1 through 23.
Transmit Framed AIS to Line Interface.
Transmit Low-Density Signal to Line Interface: Framed 0001
Pattern.
Transmit Squelch Code Register in Line Time Slot 1: PR5.
Transmit High-Density Signal to Line Interface: Framed AIS.
Transmit Unframed AIS to Line Interface.
Transmit Pseudorandom Signal to Line Interface (2
15
– 1).
Transmit Quasi-random Signal to Line Interface (ANSI T1.403).
X
X
X
X
X
1
1
X
X
X
X
X
X
X
X
X
X
X
X
1
X
1
X
1
X
X
X
X
X
X
X
X
0
0
0
1
1
0
0
0
X
X
X
X
X
X
X
X
0
1
1
1
1
1
0
0
1
1
1
0
1
0
1
0
0
0
0
0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X