Raisecom Technology Co., Ltd
5
2. Overview
2.1. Introduction
RC801/803/805-60B-FV35 series device is PDH fiber optic modem which is deployed to
transmit V.35 signals and transparent E1 data line on fiber. It also provides solution for
Router remote connection and is widely used in constructing Wide Area Networks.
RC801/803/805-60B-FV35 series device is standalone dual interface fiber optic modem
which can be placed on desktop and has individual power supply. It is used in pairs and
provides conversion between V.35 and E1 interfaces to fiber interface. It can also connect
to RC802/804/806-60B series fiber optic modem module which is inserted in RC002-16 or
RC002-4 chassis to realize SNMP network management and consequently manages
remote devices.
2.2. Main features
The first tributary of client side provides one ITU standard V.35 synchronized data
DCE interface.
The second tributary of client side provides one ITU-T G.703 E1 interface which has
both 75
Ω
BNC connector and 120
Ω
RJ45 connector.
The line side provides a dual strand fiber interface or a single strand dual
wavelength interface.
It provides the complete fiber line alarm and internal E1 detection alarm as well as
the local and remote line alarm indication.
It provides the local and remote loopback detection function of the two tributaries of
client side to check the circuit and device and perform the maintenance.
The features of the first tributary V.35 interface of client side:
Realize V.35 interface bandwidth adjustment via ITU-T G.704 frame structure.
It supports fractional /unframed (transparent) mode. The fractional mode can
configure time slot freely. The first tributary of client side provides three kinds of
clock modes: master (internal), slave (follow the fiber line clock) and V.35 terminal
clock (follow V.35 interface clock).
When the fist tributary of client side is used in pairs the remote time slot can
automatically follow local time slot configuration.
The internal error code test unit can diagnose and test circuit with the cooperation of
many kinds of loopback styles.
In the fractional mode the PCM30/PCM31 modes are optional and CRC4 verification
function is auto-negotiation.
It provides phase adjustment function for V.35 receiving data.
