S/UNI®-JET Data Sheet
Released
RBLEN
The RBLEN bit enables: the receive RED alarm (persistent OOF) indication to automatically
generate a FERF indication in the DS3 transmit stream, or a BIP8 error detection in the E3
G.832 Framer to generate a FEBE indication in the E3 G.832 transmit stream, or an LOF to
generate a RLOF indication (A-bit) in the J2 transmit stream. When the E3 G.751 framer is
selected, this bit has no effect.
When RBLEN is logic one, TFRM[1:0] is 00 binary, and RFRM[1:0] is 00 binary, assertion
of the RED indication by the framer causes a FERF to be transmitted by DS3_TRAN for the
duration of the RED assertion. Also, for DS3 frame format, the OOFEN bit is internally
forced to logic zero when RBLEN is logic one. When RBLEN is logic zero, assertion of the
RED indication does not cause transmission of a FERF.
When RBLEN is logic one, TFRM[1:0] is 01 binary, and RFRM[1:0] is 01 binary, any BIP8
error indication by the E3 G.832 framer causes a FEBE to be generated by the E3 G.832
TRAN. When RBLEN is logic zero, BIP8 errors detected by the E3 framer do not cause
FEBEs to be generated by the E3_TRAN.
When RBLEN is logic one, TFRM[1:0] is 10 binary, and RFRM[1:0] is 10 binary, any LOF
error indication by the J2 framer causes the RLOF bit (also known as the A bit) to be set in
the J2 transmit stream. When RBLEN is logic zero, LOF errors detected by the J2 framer do
not cause the RLOF bit to be set in the transmit stream.
AISEN
The AISEN bit enables the RAI signal to automatically generate a FERF indication (RAI in
G.751 or J2 mode) in the transmit stream. This bit operates regardless of framer selected
(DS3, E3, or J2). When AISEN is logic one, assertion of the AIS indication (physical AIS for
J2) by the framer causes a FERF/RAI to be transmitted by TRAN for the duration of the AIS
assertion. When AISEN is logic zero, assertion of the AIS indication does not cause
transmission of a FERF/RAI.
Note: For the RAI to be automatically transmitted when in J2 format, the FEAC[5:0] bits in
the XBOC Code Register must all be set to logic one. If the XBOC FEAC code is to be
transmitted in J2 mode, LOSEN, OOFEN, AISEN, and LCDEN should all be set to logic
zero.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990267, Issue 3
93
PMC [ PMC-SIERRA, INC ]
