
XRT84L38
425
REV. 1.0.1
OCTAL T1/E1/J1 FRAMER
The table below shows configuration of the Transmit Sa Data Link Select bits of the Transmit Signaling and
Data Link Select Register (TSDLSR).
TRANSMIT SIGNALING AND DATA LINK SELECT REGISTER (TSDLSR) (INDIRECT ADDRESS =
0XN0H, 0X0AH)
14.1.3
How to configure XRT84L38 to transmit data link information through Timeslot 16 octet
In E1 mode, Timeslot 16 octet can be configured to transmit the following:
Channel Associated Signaling (CAS) bits A, B, C and D
Common Channel Signaling (CCS) bits
The Common Channel Signaling (CCS) messages are actually data link information applicable to all thirty-two
timeslots of an E1 frame, thus the name Common Channel Signaling. The Transmit Signaling and Data Link
Control [2:0] bits of the Transmit Signaling and Data Link Select Register (TSDLSR) determine if Timeslot octet
will be used to carry data link information or CAS signals. The table below shows configuration of the Transmit
Signaling and Data Link Control [2:0] bits of the Transmit Signaling and Data Link Select Register (TSDLSR).
TRANSMIT SIGNALING AND DATA LINK SELECT REGISTER (TSDLSR) (INDIRECT ADDRESS =
0XN0H, 0X0AH)
If the Transmit Signaling and Data Link Select [2:0] bits of the Transmit Signaling and Data Link Select Register
are set to 1xx, the data link interface becomes source of the Timeslot 16 octet.
14.1.4
How to configure XRT84L38 to transmit data link information through D or E Channels
B
IT
N
UMBER
B
IT
N
AME
B
IT
T
YPE
B
IT
D
ESCRIPTION
7
Transmit Sa8 Data
Link Select
R/W
0 - Source of the Sa8 Nation bit is not from the data link interface.
1 - Source the Sa8 National bit from the data link interface.
6
Transmit Sa7 Data
Link Select
R/W
0 - Source of the Sa7 Nation bit is not from the data link interface.
1 - Source the Sa7 National bit from the data link interface.
5
Transmit Sa6 Data
Link Select
R/W
0 - Source of the Sa6 Nation bit is not from the data link interface.
1 - Source the Sa6 National bit from the data link interface.
4
Transmit Sa5 Data
Link Select
R/W
0 - Source of the Sa5 Nation bit is not from the data link interface.
1 - Source the Sa5 National bit from the data link interface.
3
Transmit Sa4 Data
Link Select
R/W
0 - Source of the Sa4 Nation bit is not from the data link interface.
1 - Source the Sa4 National bit from the data link interface.
B
IT
N
UMBER
B
IT
N
AME
B
IT
T
YPE
B
IT
D
ESCRIPTION
2-0
Transmit Signaling
and Data Link
Select
R/W
000 - Timeslot 16 octet is taken directly from the Transmit Serial Input
Interface through the TxSer_n pin.
001 - Timeslot 16 octet is taken directly from the Transmit Overhead Input
Interface through the TxOH_n pin or the Transmit Signaling Control Regis-
ter of Timeslot 16.
010 - Timeslot 16 octet is taken directly from the Transmit Serial Input
Interface through the TxSer_n pin.
011 - Timeslot 16 octet is taken directly from the Transmit Overhead Input
Interface through the TxOH_n pin or the Transmit Signaling Control Regis-
ter of Timeslot 16.
1xx - Timeslot 16 octet is taken from the data link interface.