tfra08c13 ETC-unknow, tfra08c13 Datasheet - Page 154

• Manufacturer Part Number: tfra08c13
• Description: Tfra08c13 Octal T1/e1 Framer
• Manufacturer: ETC-unknow

TFRA08C13 OCTAL T1/E1 Framer
Framer Register Architecture
Automatic and Manual Transmission of E Bit = 0 Control Register
The default value of this register is 00 (hex).
Table 138. CEPT Automatic Transmission of E Bit = 0 Control Register (FRM_PR28) (Y7C)
* Whenever bits (e.g., Si, Sa, etc.) are transmitted from the system transparently, FRM_PR29 must first be momentarily written to 001XXXXX
Sa4—Sa8 Source Register (FRM_PR29)
These bits contain the fixed transmit Sa bits and define the source of the Sa bits. The default value of this register
is 00 (hex).
Table 139. Sa4—Sa8 Source Register (FRM_PR29) (Y7D)
154
(binary). Otherwise, the transmit framer will not be able to locate the biframe alignment.
6—7
0—4
5—7
Bit
Bit
0
1
2
3
4
5
ATELTS0MFA Automatic Transmit E Bit = 0 for Received Loss of CRC-4 Multiframe Alignment. A
ATERCRCE
SaS5—SaS7
TSa4—TSa8
ATERTX
Symbol
TSiNF
TSiF
SIS,
T1E
Symbol
—
Si-Bit Source. In CEPT with no CRC-4 mode, a 1 transmits TSiF and TSiNF in the Si bit
position to the line in FAS and NOT FAS, respectively. A 0, in non-CRC-4 mode, trans-
mits system Si data to the line transparently*.
Transmit One E = 0. In CEPT with CRC-4 mode, a 0 transmits E = TSiF in frame 13 and
E = TSiNF in frame 15. A 1 transmits one E bit = 0 for each write access to TSiF = 0 or
TSiNF = 0.
Transmit Bit 1 in FAS. In CEPT with no CRC-4, this bit can be transmitted to the line in
bit 1 of the FAS. In CRC-4 mode, this bit is used for E-bit data in frame 13.
Transmit Bit 1 in NOT FAS. In CEPT with no CRC-4, this bit can be transmitted to the
line in bit 1 of the NOT FAS. In CRC-4 mode, this bit is used for E-bit data in frame 15.
Automatic Transmit E Bit = 0 for Received CRC-4 Errored Events. A 1 transmits
E = 0 to the line whenever the receive framer detects a CRC-4 errored checksum.
1 transmits E = 0 to the line whenever the receive framer detects a loss of CRC-4 multi-
frame alignment condition.
Automatic Transmit E Bit = 0 on Expiration of CEPT CRC-4 Loss of Multiframe
Timer. A 1 transmits E = 0 to the line whenever the receive framer detects the expiration
of either the 100 ms or 400 ms timer due to the loss of CRC-4 multiframe alignment.
These Bits Are Zero.
Transmit Sa4—Sa8 Bit.
Sa Source Control Bits[2:0].
(continued)
Description
Description
Preliminary Data Sheet
Lucent Technologies Inc.
Lucent Technologies Inc.
October 2000