2. Overview
2.1. Introduction
RC 903-V35FE1 is an interface converter for V.35 equipment based on E1 network
transmission. With the growing utilization of E1 resources, many data
transmission solutions using E1 link are accepted by users.
RC 903- V35FE1 is standalone equipment, with built-in power supply, and can be
placed on the table. It provides signal conversion between V.35 and fractional E1, and
can be used in pairs or alone. This equipment will not change the data from V.35
interface.
2.2.
Main feathers:
1) Provide a V35 synchronous digital DCE interface complying with ITU standard.
2) Provide an E1 interface complying with ITU standard and both 75
Ω
(unbalanced BNC
interface) and 120
Ω
(balanced RJ-45 interface) are available for our users.
3) Complete E1 line alarm including both local and remote line alarm.
4) Provide local and remote loop-back test function, which can help easily analysis the
bit rate error.
5) Support E1 fractional and transparent frame modes. When it is in the fractional mode,
the time slot can be allocated at will.
6) Provide 3 clock modes: Master clock, Slave clock, and V35 terminal clock.
7) When working in pairs in the fractional mode, the time-slot allocation of the local
equipment can automatically follow that of the remote equipment.
8) Internal bit error test unit can analysis and test the line with various loop-bake modes.
9) In the fractional mode, PCM30 and PCM31 can be chosen and CRC4 function is
self-adaptive.
10) Provide phase adjustment function for the V35 receiving data.
11) Provide fault pass through function: informing the V35 interface of the E1 fault, and
estimating E1 fault on the Router.
12) Use very large scale ASIC chip with low power consumption, four-layer circuit board
design, and high reliability.
2.3.
Equipment description
RC903/904-V35FE1series converter includes the following models:
Part number
Description
RC903-V35FE1-AC
Standalone ,
one E1 interface (
75
Ω
unbalanced or 120
Ω
Balanced), one standard V35 DCE interface (ISO2593 M34
Female),
220VAC
3