Appendix D PSAX Module Features
Fiber-Optic Interface Modules
D-30
255-700-447
PacketStar
®
PSAX 2300 Multiservice Media Gateway User Guide
, Issue 1
Release 9.0.0
The 1+1 APS/MSP protection is supported in either mode. The 1+1 APS/MSP
linear protection architecture consists of a far-end signal that is continuously
bridged (at the electrical level) to the APS working and APS protection I/O
modules so that the same payloads are transmitted identically to the near-
end working and protection I/O modules. At the near-end, the working and
protection OC-3 or STM-1 signals are monitored independently and identi-
cally for failures. The receiving I/O modules select either the working or the
protection signal as the one from which to select the traffic, based on switch
initiation criteria. Because of the continuous far-end bridge, the 1+1 architec-
ture does not allow an unprotected extra traffic channel to be provided.
The modules are supplied with the following transmission types:
•
The single-mode (SM) module (23N76) is intended for long-reach applica-
tions, typically between LANs. This module is frequently used to connect
high-speed LAN devices (such as routers) to an ATM network.
•
The multimode (MM) module (23N75) is intended for short-reach applica-
tions, for example, connecting interoffice or intraoffice sections of a local
area network (LAN).
For instructions on configuring and guidance on using these modules, see the
PacketStar PSAX 1-Port Channelized OC-3/STM-1 Unstructured CES/ATM Modules
User Guide.
Software Features
These modules use the AQueMan algorithm for traffic flow control. The
modules also support these interfaces:
•
ATM IISP (Network/User) (supported only in the STM ATM mode)
•
ATM PNNI 1.0 (supported only in the STM ATM mode)
•
ATM UNI 4.0 (supported only in the STM ATM mode)
•
ATM UNI 3.0/3.1 (supported only in the STM ATM mode)
•
Circuit emulation (supported only in the OC-3 UCE mode)
Hardware Features
The 1-Port Channelized OC-3/STM-1 Unstructured CES/ATM modules have
the optical specifications shown in Table D-3.
Table D-3. 1-Port Channelized OC-3/STM-1 Unstructured CES/ATM Module Optical Specifications
Feature
Module
CH OC-3/STM-1
UNSTR/ATM SM
CH OC-3/STM-1
UNSTR/ATM MM
Number of ports
1
1
Type of connector (two for each module, trans-
mit and receive)
SC (snap-on connec-
tor)
SC (snap-on connec-
tor)
Type of fiber optic cable
single-mode
multimode
Fiber optic cable reach (approximate, depend-
ing on fiber makeup)
15 km (9.3 miles)
2 km (6,560 feet or
1.2 miles)
Line rate, per port
155 Mbps
155 Mbps
Optical wavelength (nominal value)
1,310 nm
1,310 nm
Optical input sensitivity
-31 to -8 dBm
-30 to -14 dBm
Optical output power
-15 to -8 dBm
-20 to -14 dBm