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255-700-447
D-37
PacketStar
®
PSAX 2300 Multiservice Media Gateway User Guide
, Issue 1
Release 9.0.0
Appendix D PSAX Module Features
Fiber-Optic Interface Modules
1-Port STM-1 1+1 MSP Module (20N92 (MM)/20N93 (SM))
The 1-Port STM-1 1+1 MSP (20N92 (MM)/20N93 (SM)) modules provide
connection redundancy, enabling reliable data transport. These modules pro-
vide a fiber-optic interface operating in the concatenated mode of the
SONET-defined line rate of 155 Mbps.
The 1+1 protection implementation is compliant with the GR-253-CORE
standard and supports linear non-revertive 1+1 protection, in both bidirec-
tional and unidirectional modes. Non-revertive, or non-automatic, switch-
back reduces a service interruption due to link failure from two interruptions
to one interruption.
The module is supplied with the following transmission types:
•
Single-mode (SM) module (20N93) is intended for long-reach applications,
typically between LANs. This module is frequently used to connect high-
speed LAN devices (such as routers) to an ATM network.
•
Multimode (MM) module (20N92) is intended for short-reach applications,
for example, interoffice or intraoffice sections of a local area network
(LAN).
Software Features
The STM-1 1+1 MSP modules use the AQueMan algorithm for traffic flow
control.
Fiber-optic cable reach (approximate,
depending on fiber makeup)
15 km
(9.3 miles)
2 km
(6,560 feet or 1.2
miles)
Line rate
155 Mbps
155 Mbps
Optical wavelength
(nominal value)
1,310 nm
1,310 nm
Optical input sensitivity
-31 to -8 dBm
-32.5 to -14 dBm
Optical output power
-15 to -8 dBm
-20 to -14 dBm
System gain
15 dB
13.5 dB
Transmitter minimum optical output power
(average)
-15 dBm
-20 dBm
Transmitter maximum optical output power
(average)
-8 dBm
-14 dBm
Receiver minimum optical input power
(average)
-31 dBm
-32.5 dBm
Receiver maximum optical input power
(average)
-8 dBm
-14 dBm
Table D-8. 1-Port STM-1 Module Optical Specifications (Continued)
Feature
Module
STM-1 (SM TS) or
STM-1 (MM AQ)
STM-1 (MM TS) or
STM-1 (MM AQ)
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