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255-700-025
3-69
PacketStar
™
Access Concentrator 60 User Guide
, Issue 1
Release 6.3.0
Chapter 3 System Features
STM-1 Multi-Mode and Single-Mode Modules
STM-1 Multi-Mode and Single-Mode Modules
The STM-1 Multi-Mode (MM) and Single-Mode (SM) modules provide a
fiber optic interface operating in the concatenated mode of the SONET-
defined line rate of 155 Mbps. The interface on the STM-1 Single-Mode
module is intended for long-reach applications, typically between LANs. This
module is frequently used to connect high-speed LAN products (routers and
so on) to the ATM network.
These modules are available in two variations, which differ according to the
firmware installed on the circuit boards.
•
One variation for both the Multi-Mode and Single-Mode types, with the
names STM-1 MM AQ module and STM-1 SM AQ module, uses the
AQueMan
™
algorithm for flow control.
•
The other variation for both the Multi-Mode and Single-Mode types,
with the names STM-1 MM TS module and STM-1 SM TS module, uses
traffic shaping for flow control.
Software Features
The software also supports the following ATM Forum Technical Committee
Specifications:
•
User to Network Interface Version 3.0
•
User to Network Interface Version 3.1
•
Integrated Local Management Interface Specification Version 4.0,
af-ilmi-0065.000
Optical wavelength (nomi-
nal value)
1,300 nm
1,330 nm
• System gain
15 dB
13.5 dB
• Transmitter—minimum
optical output power
(average)
-15 dBm
-19 dBm
• Transmitter—maxi-
mum 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 3-7. OC-3c Multi-Mode and Single-Mode Hardware Specifications
Feature
Module
OC-3c SM
OC-3c MM
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