Fiber-Optic Box; Overview; Interfaces Of The Fobox - Siemens SWT 3000 Equipment Manual

Fiber Optic Module

11.2 Fiber-Optic Box

11.2 Fiber-Optic Box

Overview

11.2.1
The fiber-optic box (FOBox) is used for connecting the SWT 3000 via fiber-optic cable with a PDH-Multiplexer
or SDH-Multiplexer. For each transmission direction, a separate fiber is necessary. The FOBox contains the
FOM with the electrical/optical conversion, the interface to the multiplexer, and a power supply.
Further details are described in
An adaptor is installed for the conversion from the system connector to the alarm relay, the connectors for the
digital interface (X.21/G703.1/G703.6), and the power supply connector.
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Figure 11-2
11.2.2

Interfaces of the FOBox

The interfaces of the FOBox are carried out by an adaptor converting the pinning of the FOM to a 15-pin D-sub
socket according to the following table:
Table 11-2
D- DTE
sub
X1
Function X.21
1 Shield
2 Transmit (a)
3 Control (a)
4 Receive (a)
5 Not connected
350
2.9.4 Connection to a Multiplexer via
The Fiber-Optic Box
Pinning of the D-sub Socket X1
Name X.21
GNDS
TxD_A
C (a)
RxD_A
FO-Box.
Name G.703.1 Name G703.6 Signal
Shield Shield
TX- TX-
RX- RX-
Smart Communication, SWT 3000 Teleprotection, Equipment Manual
FO Module
Connector
X1
Pin
Direction
- A1, A31, C1,
and C31
OUT A12
OUT A10
IN A13
C53000-G6040-C605-1, Edition 03.2020