DS2196L datasheet(68/157 Pages) DALLAS

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DS2196

68 of 157

FRAMING MODE

(CCR2.3)

COUNT MOS OR F–BIT

ERRORS

(RCR2.0)

WHAT IS COUNTED

IN THE MOSCRs

MOS

number of multiframes out of sync

F–Bit

errors in the Ft pattern

ESF

MOS

number of multiframes out of sync

ESF

F–Bit

errors in the FPS pattern

9. SIGNALING OPERATION

The robbed–bit signaling bits embedded in the T1 stream can be extracted from the receive stream and

inserted into the transmit stream by each framer. There is a set of 12 registers for the receive side (RS1 to

RS12) and 12 registers on the transmit side (TS1 to TS12). The signaling registers are detailed below.

The CCR1.5 bit is used to control the robbed signaling bits as they appear at RSER. If CCR1.5 is set to

0, then the robbed signaling bits will appear at the RSER pin in their proper position as they are received.

If CCR1.5 is set to a 1, then the robbed signaling bit positions will be forced to a 1 at RSER.

RS1A TO RS12A: RECEIVE SIGNALING REGISTERS FRAMER A

(Address = 60 to 6B Hex)

RS1B TO RS12B: RECEIVE SIGNALING REGISTERS FRAMER B

(Address = E0 to EB Hex)

(MSB)

(LSB)

A(8)

A(7)

A(6)

A(5)

A(4)

A(3)

A(2)

A(1)

RS1

A(16)

A(15)

A(14)

A(13)

A(12)

A(11)

A(10)

A(9)

RS2

A(24)

A(23)

A(22)

A(21)

A(20)

A(19)

A(18)

A(17)

RS3

B(8)

B(7)

B(6)

B(5)

B(4)

B(3)

B(2)

B(1)

RS4

B(16)

B(15)

B(14)

B(13)

B(12)

B(11)

B(10)

B(9)

RS5

B(24)

B(23)

B(22)

B(21)

B(20)

B(19)

B(18)

B(17)

RS6

A/C(8)

A/C(7)

A/C(6)

A/C(5)

A/C(4)

A/C(3)

A/C(2)

A/C(1)

RS7

A/C(16)

A/C(15)

A/C(14)

A/C(13)

A/C(12)

A/C(11)

A/C(10)

A/C(9)

RS8

A/C(24)

A/C(23)

A/C(22)

A/C(21)

A/C(20)

A/C(19)

A/C(18)

A/C(17)

RS9

B/D(8)

B/D(7)

B/D(6)

B/D(5)

B/D(4)

B/D(3)

B/D(2)

B/D(1)

RS10

B/D(16)

B/D(15)

B/D(14)

B/D(13)

B/D(12)

B/D(11)

B/D(10)

B/D(9)

RS11

B/D(24)

B/D(23)

B/D(22)

B/D(21)

B/D(20)

B/D(19)

B/D(18)

B/D(17)

RS12

SYMBOL

POSITION

NAME AND DESCRIPTION

D(24)

RS12.7

Signaling Bit D in Channel 24

A(1)

RS1.0

Signaling Bit A in Channel 1

DS2196L Datasheet(PDF) 68 Page - Dallas Semiconductor

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