TMXF28155 Supermapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
Data Sheet
June 2002
12 28-Channel Framer Registers (continued)
Table 398. FRM_PMLR5, Performance Monitor Link Register 5 (COR) (continued)
Address*
Bit
Name
Function
Reset
Default
0x8LP84
5
FRM_SA7LID Sa7 Link Identification. A 1 indicates that a sequence was found
0
such that two out of three Sa7 bits are 0. (G.965, Section 16.1.2.)
4
FRM_LLBON Line Loopback On Code Detect. A 1 indicates the receive framer
detected the DS1 line loopback enable code. The activation signal
consists of repetitions on the pattern 00001 with the framing bits
replacing the pattern bits. (T1.403, Section 9.3.1.1.) Only applica-
ble in DS1 SF formats.
0
3
2
FRM_LLBOFF Line Loopback Off Code Detect. A 1 indicates the receive
framer detected the DS1 line loopback disable code. The deacti-
vation signal consists of repetitions on the pattern 001 with the
framing bits replacing the pattern bits. (T1.403, Section 9.3.1.2.)
Only applicable in DS1 SF formats.
0
0
FRM_AUXP Auxiliary Pattern. DS1 IDLEID: Each of the 24 time slots in a
frame contain the DS1 idle signal, 00010111. (T1.231, Section
6.4.8.)
Note: For ESF, the Supermapper will only check for the idle code;
it does not look for RAI.
CEPT AUXP: A 1 indicates the detection of a valid auxiliary pat-
tern (unframed 10 . . . pattern) in the CEPT mode. When in loss of
frame alignment state, an auxiliary pattern is detected when more
than 255 10 patterns are detected in a 512-bit interval. The alarm
is disabled when three or more non-10 patterns are detected in a
512-bit interval. The search for AUXP is synchronized to the first
alternating 10 pattern found. (ETS 300 233, Section 8.2.2.2,
O.151, Section 2.4.)
1
FRM_LOS
Loss of Signal. A 1 indicates that the receive line decoder has
detected a loss of signal condition. This status is only valid in the
dual-rail mode of operation.
0
DS1: Loss of signal occurs when, for 100 contiguous pulse posi-
tions, there are no pulses of either the positive or negative polarity
at the line interface. The loss of signal defect is removed upon
detecting 13 pulses over 100 pulse positions following the receipt
of a pulse, and there is no 100 pulse position interval where there
were no pulses. (T1.231, Section 6.1.2.1.1, G.775, Section 4.3.)
CEPT: Loss of signal occurs when, for 100 consecutive pulse
positions, there are no pulses of either the positive or negative
polarity at the line interface. The loss of signal defect is removed
when there are pulses in a 100 consecutive pulse position period
(G.775, Section 4.2). Note that the defect is set and cleared at the
end defined sample period.
0
FRM_BOMR Bit-Oriented Message Received. A 1 indicates a BOM has been
received in the ESF data link bits and FRM_RBOM[7:0]
0
(Table 411 on page 292) should be read. A BOM is defined in
ANSI T1.403 as a 0xxxxxx0 11111111 pattern (received right-to-
left) repeated 10 consecutive times. The 0xxxxxx0 pattern is
saved in the FRM_RBOM[7:0] register (Table 411 on page 292)
upon the tenth occurrence of the BOM message.
* See Table 393 on page 279 for values of L and P.
288
Agere Systems Inc.
ETC [ ETC ]
