
RION
TELECOM
NETWORKS
User Manual
VCL-E1 (G.703) Fiber Optic Modem

UALITY ASSURANCE PROGRAM
Orion’s products are designed and manufactured under a strict Quality
Assurance Program based on the ISO 9000:2008 philosophy and
principles. Orion pays very special attention to its vendor development
program which ensures an “end-product” of the highest quality at the
most cost effective prices.
Warranty
This Orion product is warranted against defects in material and workmanship for a period of one year
from the date of shipment. During the warranty period, Orion will, at its discretion, either repair or
replace products, which prove to be defective. For warranty service or repair, this product must be
returned to a service facility designated by Orion. The buyer shall prepay shipping charges to Orion
and the company shall pay shipping charges to return the product to the buyer. However, the buyer
shall pay all the shipping charges, duties and taxes for products returned to Orion from another
country.
Limitation of Warranty
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance
by the buyer, the buyer-supplied firmware or interfacing, unauthorized modification or misuse,
operation outside of the environmental specifications for the product or improper site preparation or
maintenance.
Exclusive Remedies
The remedies provided herein are the buyer's sole and exclusive remedies. Orion shall not be liable for
any direct, indirect, special, incidental or consequential damages, whether based on contract or any
legal theory.
Notice
This manual contains information that is proprietary to Orion Telecom Networks Inc. No part of this
publication may be reproduced in any form whatsoever without prior written approval by Orion
Telecom Networks Inc.
Safety Warnings
The exclamation point within a triangle is intended to warn the operator or service
personnel of operation and maintenance factors relating to the product and its
operating environment, which could pose a safety hazard.
Always observe standard safety precautions during installation, operation and maintenance of this
product. Only qualified and authorized service personnel should carry out adjustment, maintenance or
repairs to this instrument. No adjustment, maintenance or repairs should be performed by either the
operator or the user.
!!
2
Notice
Orion Telecom Networks Inc. - 2007-10
VCL-E1 (G.703) Fiber Optic Modem

INDEX
CAUTION
ELECTROSTATIC
SENSITIVE
DEVICES
DO NOT OPEN OR HANDLE
EXCEPT AT A
STATIC-FREE WORKSTATION
3
Particulars P. No.
Product Overview 4
Application Diagram 4
Technical Specifications 5
5
5
5
6
6
6
Time-slots selection for E1/FE1
Sync ronization Clock Settings
E1/FE1 Impedance Selection
Ordering Information 16
Electrical Interface (E1 Tributary)
Optical Interface Specifications - 850nm Multi Mode
Transmitter Optical Characteristics
Receiver Optical Characteristics 5
Optical Interface Specifications - 1310nm Single Mode
Transmitter Optical Characteristics
Receiver Optical Characteristics 6
Optical Interface Specifications - 1510nm Single Mode 6
Transmitter Optical Characteristics
Receiver Optical Characteristics 6
Front View 7
LED Indications 7
Pushbutton and Switch Indications 8
Rear View 9
AC Power Supply 9
-48V DC Power Supply 9
Optical Connection 10
E1 Connection 11
Bottom View 12
12
h 14
15
Index
Orion Telecom Networks Inc. - 2007-10
VCL-E1 (G.703) Fiber Optic Modem

Product Overview
Application Diagram
The VCL-E1 Fiber Optic Modem provides the user
the capability to establish communication between two E1
nterfaces over an optical fiber link.
It establishes a secure, long range data fiber link between
routers, multiplexers and other E1 devices.
The primary application for the VCL-E1 (G.703) Fiber Optic
Modem is to establish point-to-point fiber link at ranges
longer than any copper modem can achieve. The clock
options are Internal / External / Slave Clock - three clock
mode option.
(G.703)
/
FE1 I
Safety Warnings !!!!
For Testing : Always Install Optical Attenuators.
For Distance of less than 10 Kms Optical Attenuators
must be installed on the Optical Links. Otherwise, the
Optics will be Permanently Damaged.
VCL-E1 (G.703)
Fiber Optic Modem
VCL-E1 (G.703)
Fiber Optic
Modem
VCL-E1 (G.703)
Fiber Optic
Modem
FE1 FE1
Optical
Network
E1 RouterE1 Router
4
Product Overview
Orion Telecom Networks Inc. - 2007-10
VCL-E1 (G.703) Fiber Optic Modem

Technical Specifications
Electrical Interface (E1 Tributary)
Number 1
Nominal bit rate 2048 Kbps
Bit rate tolerance 50 ppm
Termination Impedance 120 Ohms balanced / 75 Ohms un-balanced
Line code HDB3
Frame structure As per G.704
Electrical interface As per G.703
Return loss at input port:
51.2 KHz to 102.4 Khz > 12 dB
102.4 KHz to 2048 KHz > 18dB
2048 KHz to 3072 KHz > 14 dB
Maximum Output Jitter 0.05UI
Maximum Input Jitter
20Hz to 93 Hz 1.5UI
700Hz to 100KHz 0.2UI
E1 Connectors RJ-45 / BNC
Permissible Attenuation 6 dB (max) @ 1024KHz
Optical Interface Specifications - 850nm Multi Mode
Transmitter Optical Characteristics
Receiver Optical Characteristics
Parameter Minimum Typical Maximum
Optical Data Rate 125Mb/s
Center Wavelength 830nm 850nm 860nm
Output Spectral Width (RMS) 0.85nm
Average Output power -10dBm -3dBm
Output Optical Eye Complaint with ITU-T G.957
Connectors FC
Parameter Minimum Typical Maximum
Optical Data Rate 125Mb/s
Receive Sensitivity -24dBm
Maximum Input Power -3dBm
Operating Wavelength -10dBM 850nm
Connectors FC
5
Technical Specifications
Orion Telecom Networks Inc. - 2007-10
VCL-E1 (G.703) Fiber Optic Modem