txc-03456 TranSwitch Corporation, txc-03456 Datasheet - Page 73

• Manufacturer Part Number: txc-03456
• Description: Device Level Mapper
• Manufacturer: TranSwitch Corporation

Address
14
Bit
5
4
TOHOUT
Symbol
J1LEN
Transport Overhead Bytes Output Enabled: A 1 enables the L4M to
generate the three A1 and A2 framing bytes, the C1 byte, and the H1
and H2 bytes, according to the following table. This feature in enabled in
the drop bus and external timing modes only.
TOHOUT UPC1 SVC4H
J1 Loss Of Lock Alarm Action Enable: A 1 enables the L4M to gener-
ate a receive 140 Mbit/s AIS (when AIS is enabled; RAISEN is a 1), and
path RDI is enabled and the L4M is not in a path protection ring configu-
ration (when RDIEN is a 1 and RING is 0) when a J1 loss of lock is
detected.
0
0
1
1
1
1
X
X
0
0
1
1
DATA SHEET
- 73 -
0
1
0
1
0
1
Description
No TOH bytes. The SPE starting location
(starting with J1) equals 522 when drop
or the external timing mode is selected.
For add bus timing, the starting location
is determined by the J1 pulse (AC1J1).
No TOH bytes. The SPE starting location
(starting with J1) equals 0 when drop or
the external timing mode is selected. For
add bus timing, the starting location is
determined by the J1 pulse (AC1J1).
A1, A2, C11, and H1/H2 byte generated.
The C11 byte (first C1 byte) is fixed as
01H. The pointer value is equal to 522,
the starting location of the SPE. The
generation of the TOH bytes is disabled
in the add bus timing mode.
A1, A2, C11, and H1/H2 byte generated.
The C11 byte (first C1 byte) is fixed as
01H. The pointer value is equal to 0, the
starting location of the SPE. The genera-
tion of the TOH bytes is disabled in the
add bus timing mode.
A1, A2, C11, and H1/H2 byte generated.
The C11 byte (first C1 byte) is the micro-
processor-written value (location 1EH).
The pointer value is equal to 522, the
starting location of the SPE. The genera-
tion of the TOH bytes is disabled in the
add bus timing mode.
A1, A2, C11, and H1/H2 byte generated.
The C11 byte (first C1 byte) is the micro-
processor-written value (location 1EH).
The pointer value is equal to 0, the start-
ing location of the SPE. The generation
of the TOH bytes is disabled in the add
bus timing mode.
Action
Ed. 1A, January 2000
TXC-03456
TXC-03456-MB
L4M