User manual

2
Chapter 1 RC903-V35FE1 (Rev.B) Overview
1. Descriptions:
RC903-V35FE1 is a standalone interface converter . It provides signal conversion between V.35
and transparent E1 or fractional E1, and can be used for V.35 signal over E1 network transmission.
As growing utilization of E1 resources, many data transmission solutions using E1 link are
accepted by users at large.
RC903- V35FE1 is standalone equipment, with built-in power supply, and can be placed on the
desk.
2. Specifications:
1) E1 interface:
Input impedance: 75Ω unbalanced BNC interface and 120 Ω balanced
RJ-45 interface
Interface bit rate: 2048Kbps±50ppm
Line code: HDB3
Electrical characteristics: Complies with ITU-T G.703
Frame structure: Complies with ITU-T G.704
Jitter tolerance: Complies with ITU-T G.823
Functions: Complete link alarm indication, Fault Pass Through (FPT) and
auto-reset
2) V.35 interface:
Physical characteristics: Complies with V.35 interface standard
Connector type
 ISO2593 female connector (34 pin female)
Working mode
 DCE
Interface bit rate
 V.35 interface bit rate is N×64Kbps N=1~31 at E1 fractional
pattern;
V.35 interface bit rate is 2048Kbps at E1 transparent pattern
Definition of Indicators
Power (PWR) On: power is working in good condition
Otherwise: Power faults
Loss of signal (LOS)
 OFF: receiving signal in E1 Link
Otherwise: signal loss in E1 link