Rainbow Electronics DS2180A - Manual (Page 15)

DS2180A
041995 15/36
RECEIVE SIGNALING
Robbed bit signaling data is presented at RABCD dur-
ing each channel time in signaling frames for all 24 in-
coming channels. Logical combination of clocks
RMSYNC, RSIGFR and RSIGSEL allow the user to
identify and extract AB or ABCD signaling data.
RMR1–RMR3: RECEIVE MARK REGISTERS Figure 13
(MSB) (LSB)
CH8 CH7 CH6 CH5 CH4 CH3 CH2 CH1 RMR1
CH16 CH15 CH14 CH13 CH12 CH11 CH10 CH9 RMR2
CH24 CH23 CH22 CH21 CH20 CH19 CH18 CH17 RMR3
SYMBOL POSITION NAME AND DESCRIPTION
CH24 RMR3.7 Receive Mark Registers. Each of these bit positions represents a DS0
CH1 RMR1.0 channel in the incoming T1 frame. When set, the corresponding channel
will output codes determined by RCR.4 and RCR.5.
193S RECEIVE MULTIFRAME TIMING Figure 14
RLCLK
1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 12
ЙЙЙЙЙЙЙ
ЙЙЙЙЙЙЙ
ЙЙЙЙЙЙЙ
ЙЙЙЙЙЙЙ
ЙЙЙЙЙЙЙЙ
ЙЙЙЙЙЙЙЙ
Й
Й
B A B A
FRAME #
RFSYNC
RMSYNC
RSIGSEL
RSIGFR
RABCD 1
RLINK 2
NOTES:
1. Signaling data is updated during signaling frames on channel boundaries. RABCD is the LSB of each channel
word in non-signaling frames.
2. RLINK data (S-bit) is updated one bit time prior to S-bit frames and held for two frames.