The WaveReady Transponder 740 (WRT-740) is a multi-rate, multi-protocol, auto-lock module that translates optical signals between a variety of client-side interfaces into a long-reach, single-mode, dense wavelength division multiplexing (DWDM) interface. This module includes small form factor pluggable (SFP) modules on the client side, loopback, and 3R (reshape, retime and reamplify/regenerate) functionality. SFP modules optimized for a wide range of protocols are available for singlemode and multimode fiber. Supported protocols include 100Base-FX Ethernet, Gigabit Ethernet (GigE), ESCON, Fibre channel, FICON, and OC-3 to OC-48. Supported data rates range from 125 Mb/s to 3.125 Gb/s. The WRT-740's bit-rate and protocol independence gives service providers the flexibility to meet the shifting service demands of customers without changing installed equipment. Remote management lowers operating, administration and management expenditures (OPEX). A WaveReady communications module manages the WRT740 with TL1 and a command line or telnet interface, or with TL1 or simple network management protocol (SNMP) and the JDSU Node Manager software. An embedded supervisory channel on the network side is also available for remote management of standalone modules without the cost of extra fiber or an extra WaveReady communications module. Full 3R functionality allows multiple WRT-740 modules to be deployed in series for very long reach applications. Loopback facilitates fault isolation and troubleshooting.