CIC-50 T1/E1 G.703 Interface Converter Installation and Operation Manual (Accessory Product for use only with Comtech EFData CDM-550/550T Modems) Part Number MN/CIC50.
Errata A Comtech EF Data Documentation Update Subject: Revised Paragraph 3.1.4 Pin Assignments Date: Document: October 14, 2002 CIC-50 T1/E1 G.703 Interface Converter, Installation and Operation Manual, Rev. 1, dated October 20, 1999 MN/CIC50.EA1 Attach this page to page 4 Part Number: Collating Instructions: Comments: The following changes provide updated information for Para. 3.1.4. This information will be incorporated into the next revision. Change Specifics: 3.1.
CIC-50 T1/E1 G.703 Interface Converter Installation and Operation Manual Comtech EFData is an ISO 9001 Registered Company. Part Number MN/CIC50.IOM Revision 1 Octember 20, 1999 Copyright © Comtech EFData, 2000. All rights reserved. Printed in the USA. Comtech EFData, 2114 West 7th Street, Tempe, Arizona 85281 USA, (480) 333-2200, FAX: (480) 333-2161.
Customer Support Contact the Comtech EFData Customer Support Department for: • Product support or training • Information on upgrading or returning a product • Reporting comments or suggestions concerning manuals A Customer Support representative may be reached at: Comtech EFData Attention: Customer Support Department 2114 West 7th Street Tempe, Arizona 85281 USA (480) 333-2200 (Main Comtech EFData Number) (480) 333-4357 (Customer Support Desk) (480) 333-2161 FAX or, E-Mail can be sent to the Customer Suppor
Table of Contents CUSTOMER SUPPORT ................................................................................................................................ II ABOUT THIS MANUAL ............................................................................................................................. IV Conventions and References ................................................................................................................
Preface CIC-50 T1/E1 G.703 Interface Converter About this Manual This manual provides installation and operation information for the Comtech EFData CIC-50 T1/E1 G.703 Interface Converter. This is a technical document intended for earth station engineers, technicians, and operators responsible for the operation and maintenance of the CIC-50 T1/E1 G.703 Interface Converter.
CIC-50 T1/E1 G.703 Interface Converter Preface SAFETY NOTICES ELECTRICAL SAFETY The CIC-50 1:1 Redundancy Switch has been shown to comply with the following safety standard: EN 60950: Safety of Information Technology Equipment, including electrical business machines The equipment is rated for operation at +12 volts DC and -12 volts DC. It has a maximum power consumption of 2.0 watts. The power supply current is, in all circumstances, supplied by a single Comtech CDM-550/550T Modem.
Preface CIC-50 T1/E1 G.703 Interface Converter Telecommunications Terminal Equipment Directive In accordance with the Telecommunications Terminal Equipment Directive 91/263/EEC, this equipment should not be directly connected to the Public Telecommunications Network. EMC (ELECTROMAGNETIC COMPATIBILITY) The CIC-50 T1/E1 G.
CIC-50 T1/E1 G.703 Interface Converter Preface Warranty Policy This Comtech EFData product is warranted against defects in material and workmanship for a period of two years from the date of shipment. During the warranty period, Comtech EFData will, at its option, repair or replace products that prove to be defective. For equipment under warranty, the customer is responsible for freight to Comtech EFData and all related custom, taxes, tariffs, insurance, etc.
Preface CIC-50 T1/E1 G.703 Interface Converter This page is intentionally left blank. viii Rev.1.
1 Chapter 1. INTRODUCTION While the CDM-550/550T modem is capable of data rates up to 2048 kbps, its standard interface is limited to EIA-422, V.35 and EIA-232 formats only. In order to accommodate the G.703 data formats commonly used at 1544 kbps (T1) and 2048 kbps (E1), the CIC-50 converter attaches to the rear of the modem at the 25-pin data connector. No external power is required and all settings are made on the CIC-50 using three switches.
. CIC-50 T1/E1 G.703 Interface Converter 2 Chapter 2. INSTALLATION 1. Power down the modem before installing the converter. 2. Remove the six flathead screws (four on the sides, two on top) and lift off the cover of the CIC-50. 3. The 25-pin male D-sub connector includes two captive screws which can be reached by sliding a screwdriver through the holes located at the opposite end of the CIC-50. The only reason for removing the cover is to clearly guide the screwdriver to these captive screws. 4.
CIC-50 T1/E1 G.703 Interface Converter . 3 Chapter 3. OPERATION After applying power to the modem, the following configuration changes must be made to the modem in order for it to operate with the CIC-50. • Program the transmit and receive data rates to either 1544 or 2048 kbps. Both directions must be at the same rate. • Set the data interface type to EIA-422. The modem itself operates in this electrical format while the converter translates between EIA-422 and G.703.
. 3.1.2 CIC-50 T1/E1 G.703 Interface Converter AMI or HDB3/B8ZS For both T1 and E1 formats, this sets the G.703 output to either the uncoded Alternate Mark Invert (AMI) format, or to the appropriate zero substitution line code used for T1 (B8ZS) or E1 (HDB3). 3.1.3 E1 BAL or UNBAL For E1 only, this adjusts the impedance on the G.703 input between 120 ohms for balanced and 75 ohms for unbalanced. The 15-pin D-sub connector should be used for balanced and the two BNC connectors for unbalanced.
CIC-50 T1/E1 G.703 Interface Converter . 4 Chapter 4. INDICATORS AND TROUBLESHOOTING After configuring both the CDM-550 and the CIC-50, two indicators are available on the CIC-50 to monitor the condition of the incoming G.703 data. If no marks are received over 175 bit times at T1 or 32 bit times at E1, the Loss Of Signal LED will illuminate.
. CIC-50 T1/E1 G.703 Interface Converter 5 Chapter 5. SUMMARY OF SPECIFICATIONS Equipment Type T1/E1 G.703 Interface Converter Modems Supported Comtech EFData CDM-550 and CDM-550T Digital Satellite Modems Operating Modes E1 (2048 kbps) balanced (120 ohms) and unbalanced (75 ohms) T1 (1544 kbps) unbalanced (100 ohms) Per ITU Recommendation G.703 Jitter and Wander Per ITU Recommendations G.823 and G.824 Power requirements 2.
METRIC CONVERSIONS Units of Length Unit Centimeter Inch Foot Yard Mile Meter Kilometer Millimeter 1 centimeter — 0.3937 0.03281 0.01094 6.214 x 10-6 0.01 — — 1 inch 2.540 — 0.08333 0.2778 1.578 x 10-5 0.254 — 25.4 1 foot 30.480 12.0 — 0.3333 1.893 x 10-4 0.3048 — — 1 yard 91.44 36.0 3.0 — 5.679 x 10-4 0.9144 — — 1 meter 100.0 39.37 3.281 1.094 6.214 x 10-4 — — — 1 mile 1.609 x 105 6.336 x 104 5.280 x 103 1.760 x 103 — 1.609 x 103 1.
2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 • 333 • 2200 PHONE 480 • 333 • 2161 FAX
