Toshiba GRL100-701B Instruction Manual page 32

GRL100
Optical interface
GRL100
Electrical interface
GRL100
Optical interface
O/E: Optical/Electrical converter
MUX: Multiplexer
Figure 2.2.13.2 Link to Communication Circuit
Direct link
When connected to single-mode (SM) 10/125µm type of dedicated optical fiber communication
circuits and using Duplex LC type connector for 30km class, the optical transmitter is an LD
with output power of more than –13dBm and the optical receiver is a PIN diode with a sensitivity
of less than –30dBm. For 80km class, the optical transmitter is an LD with output power of more
than –5dBm and the optical receiver is a PIN diode with a sensitivity of less than –34dBm.
When connected to graded-index (GI) multi-mode 50/125µm type or 62.5/125µm type of
dedicated optical fiber telecommunication circuit and using an ST type connector, the optical
transmitter is an LED with output power of more than –19dBm or –16dBm and the optical
receiver is a PIN diode with a sensitivity of less than –24dBm.
For details, refer to Appendix K.
Link via multiplexer
The GRL100 can be linked to a multiplexed communication circuit with an electrical or optical
interface. The electrical interface supports CCITT G703-1.2.1, G703-1.2.2 and 1.2.3,
X.21(RS530) or RS422. Twisted pair cable with shield (<60m) is used for connecting the relay
and multiplexer.
In the optical interface, optical fibers of graded-index multi-mode 50/125µm or 62.5/125µm
type are used and an optical to electrical converter is provided at the end of the multiplexer. The
electrical interface between the converter and the multiplexer supports CCITT G703-1.2.1,
G703-1.2.2 and 1.2.3, X.21(RS530) or RS422.
A D-sub connector (DB-25) or an ST connector is used for electrical linking and optical linking,
respectively.
Optical fiber circuit
(a) Direct link
Twisted pair cable with shield < 60m
(b) Electrical link via multiplexer
Twisted pair cable
Optical
with shield < 60m
fibers
O/E
(c) Optical link via multiplexer
 31 
6 F 2 S 0 8 5 0
Multiplexed circuit
MUX
MUX