
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
June 2002
262
Agere Systems Inc.
TMXF28155/51 Supermapper
Data Sheet
12 28-Channel Framer Registers
(continued)
0x80050
10
FRM_CMS
CHI Clock Mode.
This bit is only applicable in the CHI mode.
Otherwise, it should be set to 0.
0 = CHI clock and CHI data have the same rate.
1 = CHI clock is twice the rate of CHI data.
CHI Dual Time-Slot Mode.
This bit is only applicable in the
CHI 4.096 Mbits/s (no ASM) and 8.192 Mbits/s (without ASM)
modes.
0
9
FRM_CHIDTS
0 = enables 32 contiguous time slots.
1 = enables double time-slot mode in which the transmit CHI
drives data for one time slot and 3-states for the subse-
quent time slot.
Stuff Position/Link Start.
CHI modes only: determines the
position of the stuffed time slots in conjunction with the byte
offset.
0 = SDDDSDDDSDDDS.. . . . . . . (TS0—TS31).
0
8
FRM_STUFFL/
FRM_LNKSTART
1 = SDDDDDD. . . . . . . SSSSSSS (TS0—TS31).
NSMI modes only: this bit determines how links are numbered
on the NSMI. Internally, links are numbered starting at 1.
0 = NSMI link numbering starts at 0.
1 = NSMI link numbering starts at 1.
System AIS on Loss of Frame Alignment.
0 = no action.
1 = system AIS is transmitted when the receive framer or the
mapper loss of frame alignment (MFA for DS1, BFA for
CEPT) is detected.
System AIS on CEPT Timer Expiration.
0 = no action.
1 = system AIS is transmitted when the receive framer loss of
multiframe alignment timer expiration is detected. (CEPT
only.)
CEPT Dual NOTFAS.
This bit is applicable in all system
modes.
1
7
FRM_AISLFA
0
6
FRM_AISCRCT
0
5
FRM_DNOTFAS
0 = FAS and NOTFAS time slots are transmitted to the sys-
tem. The receive system interface expects both FAS and
NOTFAS time slots.
1 = NOTFAS is transmitted twice to the system (in the NOT-
FAS and FAS time slots). The receive system expects
time slots 0 to carry NOTFAS that is repeated twice.
0
Table 359. FRM_SYSGR1, System Interface Global Register 1 (R/W)
(continued)
Address
Bit
Name
Function
Reset
Default