BT8376EPF datasheet(303/323 Pages) CONEXANT

Part #	BT8376EPF

Description	single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces

PDF	323 Pages

Scroll/Zoom	100%

Manufacturer	CONEXANT [Synaptics Incorporated.]

Direct Link	https://www.synaptics.com/

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303 / 323 page

Bt8370/8375/8376

Appendix A

Fully Integrated T1/E1 Framer and Line Interface

A.4 Extended Superframe Format (ESF)

N8370DSE

Conexant

A-5

A.4 Extended Superframe Format (ESF)

In Extended Superframe Format (ESF) Figure A-2, and Table A-4, the

multiframe structure is extended to 24 frames. The channel structure is identical

to D4 (SF) format. Robbed-bit signaling is accommodated in frame 6 (A-bit),

frame 12 (B-bit), frame 18 (C-bit), and frame 24 (D-bit).

The F-bit pattern of ESF contains three functions:

Framing Pattern Sequence (FPS), which defines the frame and multiframe

boundaries.

Facility Data Link (FDL), which allows data such as error performance to

be passed within the T1 link.

Cyclic Redundancy Check (CRC), which allows error performance to be

monitored and enhances the reliability of the receiver's framing algorithm.

Figure A-2. T1 Extended Superframe PCM Format

Frame 12

Frame 6

Bit 8

During:

24 Channels per Frame

Frame = 193 Bits

Multiframe

ESF = 24 Frames

8 Bits per Channel

Signalling Information

FDL

CRC

FPS

Frame 18

Frame 24

BT8376EPF Datasheet(PDF) 303 Page - Synaptics Incorporated.