ETSI
Representing members from 54 countries, ETSI promotes worldwide standardization in telecommunications, broadcasting and information technology. The work of ETSI is closely aligned with the market needs of network operators, manufacturers, service providers, research institutions, and end users.
ETSI ETR 051
Human Factors (HF); Usability checklist for telephones Basic requirements
$11.00 $21.51
ETSI ETR 052
Terminal Equipment (TE); Service intercommunication requirements for Teletex terminal equipment
$11.00 $21.51
ETSI ETR 053
Radio Equipment and Systems (RES); Radio site engineering for radio equipment and systems in the mob
$39.00 $78.50
ETSI ETR 053/C1
Corrigendum to - Radio Equipment and Systems (RES); Radio site engineering for radio equipment and s
$73.00 $146.00
ETSI ETR 054
Integrated Services Digital Network (ISDN); The protocol reference model and its relationship with t
$9.00 $17.50
ETSI ETR 055-1
Universal Personal Telecommunication (UPT); The service concept; Part 1: Principles and objectives
$7.00 $14.00
ETSI ETR 055-10
Universal Personal Telecommunication (UPT); The service concept; Part 10: Supplementary services
$9.00 $17.50
ETSI ETR 055-11
Universal Personal Telecommunication (UPT); The service concept; Part 11: Service requirements on pr
$7.00 $14.00
ETSI ETR 055-2
Universal Personal Telecommunication (UPT); The service concept; Part 2: General service description
$9.00 $17.50
ETSI ETR 055-3
Universal Personal Telecommunication (UPT); The service concept; Part 3: Service aspects of charging
$11.00 $21.51
ETSI ETR 055-4
Universal Personal Telecommunication (UPT); The service concept; Part 4: Service requirements on sec
$9.00 $17.50
ETSI ETR 055-5
Universal Personal Telecommunication (UPT); The service concept; Part 5: Types of UPT terminals and
$9.00 $17.50
ETSI ETR 055-6
Universal Personal Telecommunication (UPT); The service concept; Part 6: UPT subscriptions, service
$13.00 $25.50
ETSI ETR 055-7
Universal Personal Telecommunication (UPT); The service concept; Part 7: User procedures and user st
$13.00 $25.50