PD 7027:1995
Current
The latest, up-to-date edition.
Essential requirements for terminal equipment intended for connection to digital leased circuits of the public telecommunications network using a CCITT Recommendation X.21bis interface
Hardcopy , PDF
English
15-01-1995
Committees responsible
Foreword
Specification
1. Scope
2. References
3. Definitions and abbreviations
4. General
5. Connection requirements
6. Electrical characteristics of interchange circuits
7. Safety
8. Electromagnetic compatibility
Annexes
A. (normative) Requirements table
B. (informative) Information for test purposes
C. (normative) General conditions of test
Tables
1. Connector pin designations for connection to X.21
bis service at 2400, 4800, 9600 and 19200 bits/s
2. Connector pin designations for connection to X.21
bis service at 48, 56 and 64 kbit/s
A.1 Requirements table for TE operating at 2400, 4800,
9600 or 19200 bits/s
A.2 Requirements table for apparatus operating at 48,
56 or 64 kbit/s using unbalanced double current
interchange circuits conforming to CCITT
Recommendation V.28
A.3 Requirements table for apparatus operating at 48,
56 or 64 kbit/s using unbalanced double current
interchange circuits conforming to CCITT
Recommendation V.35
B.1 Identification of the implementation
B.2 Requirements table for TE operating at 2400, 4800,
9600 or 19200 bits/s
B.3 Requirements table for apparatus operating at 48,
56 or 64 kbit/s using unbalanced double current
interchange, circuits conforming to CCITT
Recommendation V.28
B.4 Requirements table for apparatus operating at 48,
56 or 64 kbits/s using balanced double current
interchange circuits conforming to CCITT
Recommendation V.35
B.5 Environmental test conditions
B.6 Additional information about terminal equipment
C.1 Tolerances of components and physical quantities
List of references
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.