DS26401 datasheet(73/309 Pages) DALLAS

73 / 309 page

DS26401 Octal T1/E1/J1 Framer

RS1 to RS12

Receive Signaling Registers

040h to 04Bh [+ (200h x n) : where n = 0 to 7, for Ports 1 to 8]

In the ESF framing mode, there can be up to four signaling bits per channel (A, B, C, and D). In the D4 framing

mode, there are only two signaling bits per channel (A and B). In the D4 framing mode, the framer repeats the A

and B signaling data in the C and D bit locations. Therefore, when the framer is operated in D4 framing mode, the

user needs to retrieve the signaling bits every 1.5ms as opposed to 3ms for ESF mode. The receive-signaling

registers are frozen and not updated during a loss-of-sync condition. They contain the most recent signaling

information before the OOF occurred.

(MSB)

(LSB)

CH1-A

CH1-B

CH1-C

CH1-D

CH13-A

CH13-B

CH13-C

CH13-D

RS1

CH2-A

CH2-B

CH2-C

CH2-D

CH14-A

CH14-B

CH14-C

CH14-D

RS2

CH3-A

CH3-B

CH3-C

CH3-D

CH15-A

CH15-B

CH15-C

CH15-D

RS3

CH4-A

CH4-B

CH4-C

CH4-D

CH16-A

CH16-B

CH16-C

CH16-D

RS4

CH5-A

CH5-B

CH5-C

CH5-D

CH17-A

CH17-B

CH17-C

CH17-D

RS5

CH6-A

CH6-B

CH6-C

CH6-D

CH18-A

CH18-B

CH18-C

CH18-D

RS6

CH7-A

CH7-B

CH7-C

CH7-D

CH19-A

CH19-B

CH19-C

CH19-D

RS7

CH8-A

CH8-B

CH8-C

CH8-D

CH20-A

CH20-B

CH20-C

CH20-D

RS8

CH9-A

CH9-B

CH9-C

CH9-D

CH21-A

CH21-B

CH21-C

CH21-D

RS9

CH10-A

CH10-B

CH10-C

CH10-D

CH22-A

CH22-B

CH22-C

CH22-D

RS10

CH11-A

CH11-B

CH11-C

CH11-D

CH23-A

CH23-B

CH23-C

CH23-D

RS11

CH12-A

CH12-B

CH12-C

CH12-D

CH24-A

CH24-B

CH24-C

CH24-D

RS12

DS26401 Datasheet(PDF) 73 Page - Dallas Semiconductor

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