Data sheet, E1 attachment, E1- attachment – Procom E1 Attachment User Manual

Page 2

Data Sheet

E1- Attachment

E1 Attachment for 4FTR and LCPU

The following block diagram illustrates the general mode of operation of the E1

attachment for the 4FTR or LCPU.

E1 Attachment

STI (Digital Input)

E1-

Chip

STI (Digital Input)

FRM

CLK

Data Bus

RST

n
d

c
a

o
n

Uart

4FTR/LCPU

µ-Prozessor

4FTR/LCPU

RST

10MHz

Block diagram E1

The E1 transceiver chip on the E1 attachment is clocked with 20 MHz. The
microprocessor regulates communication with the DVS-21 and the control of the
display LEDs.
The DVS-21s’ own control information (lines, intercom/PA, low frequency (LF)
control) is exchanged bidirectionally between µ-processor and BusCPU of the carrier
card.
The LF wanted signals are managed by the PCM bus (STI, STO, FRM and CLK).

A 2 MBit/s (HDB3) interface forms the connection to the outside world with 30 user
channels and 2 control channels according to ETSI ETS 300 011, ETS 300 166, and
ETS 300 233. The control data can be transmitted to the remote DVS-21 system over
one of two time slots, channel 0 (with 4/5 S-bits) or channel 16 (free signal channel).

In the ICS software a selection can be made which time slot will contain the control
data.

For transmission we differentiate between transparent and framed transmission.

Date:

19.03.2009 Page:

2/7 Author:

Document-No.:

DB_E1_ 2861_01