
PM7346 S/UNI-QJET
DATASHEET
PMC-960835
ISSUE 6
SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE
102
logic 0, assertion of the OOF indication does not cause transmission of a
FERF/RAI.
Note that 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 1. If the
XBOC FEAC code is to be transmitted in J2 mode, LOSEN, OOFEN, AISEN,
and LCDEN should all be set to logic 0.
RBLEN:
The RBLEN bit enables the receive
R
ED alarm (persistent out of frame)
indication to automatically generate a FERF indication in the DS3 transmit
stream, or a
B
IP8 error detection in the E3 G.832 Framer to generate a FEBE
indication in the E3 G.832 transmit stream, or an
L
OF 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 1 and 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 0 when RBLEN is logic 1. When RBLEN is logic 0, assertion of
the RED indication does not cause transmission of a FERF. When RBLEN is
logic 1 and 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 0, BIP8 errors detected by the E3
framer do not cause FEBEs to be generated by the E3_TRAN. When RBLEN
is logic 1 and 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 0, 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 receive alarm indication 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 1, 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 0, assertion of the AIS indication does
not cause transmission of a FERF/RAI.
Note that 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 1. If the
XBOC FEAC code is to be transmitted in J2 mode, LOSEN, OOFEN, AISEN,
and LCDEN should all be set to logic 0.