User Manual
3-20
Chapter 1 Introduction
1.1 Description
FE1/V.35 interface converter is designed based on an ASIC chip. The chip
adopts special patent technology of reduced dithering, digital phase
locked and distill clock, E1 anti-jamming, etc. The inner software and
hardware are all modularity, integrating coding, decoding, message
insertion and alarm, and make the circuit simple so as to improve the
reliability of the device. FE1/V.35 interface converter convert V.35 to E1,
and V.35 interface works at DCE mode.
1.2 Characteristics
y
Dithering tolerance and dithering transmission characteristic of E1
channel have high performance, which is superior to industry
standard
y
Support CAS and CCS mode
y
Support CRC-4 verifying
y
Follow remote device settings can be set
y
Data rate of E1 interface N×64kbps(N=1~32)is adjustable
y
Support autosense V.35 phase
y
Three clock modes are selectable
y
The circuit is designed simply, the device works steadily
1.3 Technical Parameters
Mode: DCE
Standard: comply with ITU-T V.35 standard
Data rate: N×64Kbps(N=1~32),framed
V.35
Interface
Connector: DB25 female
Data rate: N×64Kbps
（
N=1~32
）
Tolerance: ±50ppm
Line code: HDB3
E1
Interface
Electric characteristic: comply with ITU-T G.703
standard
