SA9101 datasheet(13/40 Pages) SAMES

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SA9101

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Signal Processing

General

PCM line bit rate

2048 kbps ±50 ppm

Single frame length

256 bit, No. 1 ... 256

Framing frequency

8 kHz

Organization

32 timeslots, No. 0 ... 31

with 8 bits each, No. 1 ... 8

Timeslot 0 is reserved for frame alignment word and service Information. Switching

between the two word framing formats (Doubleframe/CRC-Multiframe) is done via the

Control Register.

Line Interfacing

Dual rail data with HDB3 coding in conjunction with double violation detection or

extended code violation detection. Errors are counted by the Code Violation

Counter. (Selectable between 8 and 10 bit counter.)

Single rail unipolar data with no zero suppression algorithm.

General alarms

AIS

Detection and Transmission.

NOS

No Signal Detection.

RAI

Remote Alarm Indication and Transmission.

Channel Assignment (including Timeslot 0)

The channel (timeslot) assignment from the PCM line to the system internal highway is

performed without any changes of channel numbering (TS0,...,TS31). In the receive

direction, the contents of timeslot 0 are switched through transparently. In the transmit

direction, the contents of timeslot 0 of the outgoing PCM frame are normally generated

by the SA9101. Additionally, one of three Transparent Modes can be selected to achieve

transparency either for Sn bit information, Sn and Si bit information or for all of the data

in timeslot 0.

n and Si bits can be fed through from the system interface (DXI) by activating transparent

mode CR5B4, known as Timeslot 0 Signalling Transparent mode. Only S

n bits can be

fed through DXI when the Extended Signalling Transparent mode is activated.

Priority is in the following order:

Highest - Timeslot 0 Transparent Mode (CR5B5)

Medium - Timeslot 0 Extended Signalling Transparent Mode (CX1B6)

Lowest

- Timeslot 0 Signalling Transparent Mode (CR5B4)

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