Comxion E3FOM, User Manual, Page: 5 / 42

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Chapter 1 Introduction
1-1 Functional Description
Comxion E3FOM is a high-speed fiber optics modem that converts E3 signal into an
optical data stream. It extends the transmission distance up to 80 kilometers. With the
optional secondary optical link, E3FOM provides 1+1 optical line protection. In addition,
the E3FOM also provides the standard SNMP interface for Network Management, using
Ethernet and PPP ports to connect to the central office. Users can monitor and configure
the E3FOM through in-band operation channel to reach a remote terminal. Moreover,
E3FOM simplifies testing and maintenance with order wire, allowing voice communication
between local and remote maintenance crews.
— Transparent E3 signal between electrical and optical link
— 1+1 auto-protection switch for optical link
— 1310/1550 nm optical MLM mode laser for customer applications
— 16 – 52 dB optical system gain
— SNMP agent for local/remote unit management and performance monitoring that
included E3 and optical links
— Provides BPV error count for E3 interface performance monitoring
— Provides performance monitoring for optical interface
— LAN and PPP ports are provided for SNMP management.
— Embedded Operation Channel (EOC) for remote unit performance monitoring and
configuration
— Provides local/remote loopback and request for remote loopback for diagnostics
— Compliant with ITU-T G.703 E3 electrical interface
— Compliant with ITU-T G.823 E3 jitter tolerance
— Compliant with ITU-T G.751 E3 jitter transfer
— Order wire (OW) channel is available for end-to-end installation and maintenance.
— Easy installation and status monitoring through LCD panel and keypad or VT-100
terminal
— ELOS/AIS/RDI LED indicators for E3 electrical link
— OLOS/AIS/RDI LED indicators for optical link
— Central office visible/audible alarm relay
— Stand-alone or 19” / 23” rack-mounted
— Redundant power supply with DC/AC options
— Compliant with ITU-T G.652 single mode fiber transmission medium