Rainbow Electronics DS2153Q User Manual

Page 22

DS2153Q

022697 22/48

conditions. Their validity should be qualified by check-
ing for synchronization at the CAS level. In CCS signal-
ing mode, RS1 to RS16 can also be used to extract
signaling information. Via the SR2.7 bit, the user will be

informed when the signaling registers have been loaded
with data. The user has 2 ms to retrieve the data before
it is lost.

TS1 TO TS16: TRANSMIT SIGNALING REGISTERS (Address=40 to 4F Hex)

(MSB)

(LSB)

A(1)

B(1)

C(1)

D(1)

A(31)

B(16)

C(16)

D(16)

A(2)

B(2)

C(2)

D(2)

A(32)

B(17)

C(17)

D(17)

A(3)

B(3)

C(3)

D(3)

A(33)

B(18)

C(18)

D(18)

A(4)

B(4)

C(4)

D(4)

A(34)

B(19)

C(19)

D(19)

A(5)

B(5)

C(5)

D(5)

A(35)

B(20)

C(20)

D(20)

A(6)

B(6)

C(6)

D(6)

A(36)

B(21)

C(21)

D(21)

A(7)

B(7)

C(7)

D(7)

A(37)

B(22)

C(22)

D(22)

A(8)

B(8)

C(8)

D(8)

A(38)

B(23)

C(23)

D(23)

A(9)

B(9)

C(9)

D(9)

A(39)

B(24)

C(24)

D(24)

A(10)

B(10)

C(10)

D(10)

A(40)

B(25)

C(25)

D(25)

A(11)

B(11)

C(11)

D(11)

A(41)

B(26)

C(26)

D(26)

A(12)

B(12)

C(12)

D(12)

A(42)

B(27)

C(27)

D(27)

A(13)

B(13)

C(13)

D(13)

A(43)

B(28)

C(28)

D(28)

A(14)

B(14)

C(14)

D(14)

A(44)

B(29)

C(29)

D(29)

A(15)

B(15)

C(15)

D(15)

A(45)

B(30)

C(30)

D(30)

SYMBOL

POSITION

NAME AND DESCRIPTION

TS1.0/1/3

Spare Bits

TS1.2

Remote Alarm Bit

A(1)

TS2.7

Signaling Bit A for Channel 1

D(30)

TS16.0

Signaling Bit D for Channel 30

Each Transmit Signaling Register (TS1 to TS16) con-
tains the CAS bits for two timeslots that will be inserted
into the outgoing stream if enabled to do so via TCR1.5.
On multiframe boundaries, the DS2153Q will load the
values present in the Transmit Signaling Register into
an outgoing signaling shift register that is internal to the
device. The user can utilize the Transmit Multiframe bit
in Status Register 2 (SR2.5) to know when to update the
signaling bits. The bit will be set every 2 ms and the user
has 2 ms to update the TSR’s before the old data will be
retransmitted.

The TS1 register is special because it contains the CAS
multiframe alignment word in its upper nibble. The
upper nibble must always be set to 0000 or else the ter-
minal at the far end will lose multiframe synchronization.
If the user wishes to transmit a multiframe alarm to the
far end, then the TS1.2 bit should be set to a one. If no
alarm is to be transmitted, then the TS1.2 bit should be
cleared. The three remaining bits in TS1 are the spare
bits. If they are not used, they should be set to one. In
CCS signaling mode, TS1 to TS16 can also be used to
insert signaling information. Via the SR2.5 bit, the user

TS1 (40)

TS2 (41)

TS3 (42)

TS4 (43)

TS5 (44)

TS6 (45)

TS7 (46)

TS8 (47)

TS9 (48)

TS10 (49)

TS11 (4A)

TS12 (4B)

TS13 (4C)

TS14 (4D)

TS15 (4E)

TS16 (4F)