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General 1-1
Chapter 1
Introduction
1.1 General
The AMC-101, a Universal Converter and Repeater, provides retimed or
transparent conversion of optical and electrical signals for ATM, FDDI, Fast
Ethernet and other protocols at data rates up to 155 Mbps. The modularity
of the AMC-101 interfaces enables field-changeable conversion between
any two media.
Transparent modules provide cost-effective media conversion without
reclocking. Retimed modules provide media conversion with reclocking,
which enables the AMC-101 to be used as a repeater. These modules can
also be set for transparent operation.
AMC-101 is supplied as a standalone unit. Special hardware for mounting
either a single unit or two units side-by-side in a 19" rack can be ordered
separately.
Retimed Modules
The AMC-101 provides retimed media conversion for the following ATM
interfaces:
• TAXI (100 Mbps)
• STM-1
• STS-3c
• STS-1 over optical and electrical interfaces.
Retimed conversion is also available for FDDI and Fast Ethernet between
single mode and multimode fiber, and for extending FDDI UTP
connections over fiber. The retimed modules provide rate selection for 51,
100 or 155 Mbps. When set to one of these rates, the retimed module
regenerates and reclocks the incoming signal and acts as an ATM or FDDI
repeater. When the switch is set to "OTHER", the modules regenerate the
signal without reclocking as transparent modules do.
Transparent
Modules
The AMC-101 provides transparent conversion for any two-level optical
protocol. Transparent modules are recommended for short distances and
for all fiber and copper applications at less than 100 Mbps.
A special WRAP button activates loopbacks at the two interfaces. This can
be used for test purposes or for special applications as explained later.