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Function

Description

BRI Line Interface

Number of Ports

BRI4:4 Ports (16Line:2B 

× 4)

Transfer Rate

192Kbit/s

Line Code

AMI

BRI Line Interface IC

PSB21150 made by Infineon
Major Function
Framer
Line Driver/Receiver
HDLC Controller (D channel)
Clock Extraction/Monitoring
Elastic Buffer (Bchannel)

Line Interface Circuit (IC)

Main Front End Circuit
Pulse Transformer
Surge Absorber
EMC Fitter
Terminating Resistance

DC Supply circuit

Supplies DC power during the intercom mode
Supplied voltage :40V
Max. power supply:4.5W [max]/1 line
BRI4

→10W[max]/The entire board

Power supply mode :Separate-line  power supply mode
Phantom power supply mode
Power supply ON/OFF switching function (Software regulated)
Surge protection function
Software protection by comparator

→Relay OFF

Hardware protection by poly-switch

eSAMSON (ASIC)

EC Bus Interface Functional (Slave)
H.100 Bus Interface Functional
Digital PLL  Functional Local Bus Iterface Functional (Compatible with legacy)
Timing Switch Function, Gain Control Function, FIFO/DPRAM Function
See the specification of eSAMSON  for details.

Controller

CPU

SH7020(12.288MHz)...SH-1

Flash

4Mbit (256K 

×16) For software download

SRAM

4Mbit (256K 

×16)

eSAMSON (ASIC)

Card State Display LED:1
Line State Display LED:4

Lin Interface Connector

RJ45:4ports

On-board DC/DC Power Supply

Input+15V
+3.3V

Self-diagnostic Functional

During power failure:Port 1 and port 2 are physically connected.
Condition: Port 1

→outside  line, Port  2 →extension line 

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