| R.2 |
Element error rate |
| R.4 |
Methods for the separate measurements of the degrees of various
types of telegraph distortion |
| R.5 |
Observation conditions recommended for routine distortion
measurements on international telegraph circuits
|
| R.9 |
How
the laws governing distribution of distortion should be arrived
at |
| R.11 |
Calculation of the degree of distortion of a telegraph circuit
in terms of the degrees of distortion of the component links
|
| R.20 |
Telegraph modem for subscriber lines
|
| R.21 |
9600
bit/s modem standardized for use in the telegraph TDM system
|
| R.22 |
Data
over voice 19 200 bit/s modem standardized for use on telephone
network subscriber lines |
| R.30 |
Transmission characteristic for international VFT links
|
| R.31 |
Standardization of AMVFT systems for a modulation rate of 50
bauds |
| R.35 |
Standardization of FMVFT systems for a modulation rate of 50
bauds |
| R.35bis |
50-baud wideband VFT systems |
| R.36 |
Coexistence of 50-baud/120-Hz channels, 100-baud/240-Hz
channels, 200-baud/360-Hz or 480-Hz channels on the same
voice-frequency telegraph system
|
| R.37 |
Standardization of FMVFT systems for a modulation rate of 100
bauds |
| R.38A |
Standardization of FMVFT system for a modulation rate of 200
bauds with channels spaced at 480 Hz
|
| R.38B |
Standardization of FMVFT systems for a modulation rate of 200
bauds with channels spaced at 360 Hz usable on long
intercontinental bearer circuits generally used with a 3-kHz
spacing |
| R.39 |
Voice-frequency telegraphy on radio circuits
|
| R.40 |
Coexistence in the same cable of telephony and super-telephone
telegraphy |
| R.43 |
Simultaneous communication by telephone and telegraph on a
telephone-type circuit |
| R.44 |
6-unit synchronous time-division 2-3-channel multiplex telegraph
system for use over FMVFT channels spaced at 120 Hz for
connection to standardized teleprinter networks
|
| R.49 |
Interband telegraphy over open-wire 3-channel carrier systems
|
| R.50 |
Tolerable limits for the degree of isochronous distortion of
code-independent 50-baud telegraph circuits
|
| R.51 |
Standardized text for distortion testing of the code-independent
elements of a complete circuit |
| R.51bis |
Standardized text for testing the elements of a complete circuit
|
| R.52 |
Standardization of international texts for the measurement of
the margin of start-stop equipment
|
| R.53 |
Permissible limits for the degree of distortion on an
international 50-baud/120-Hz VFT channel (frequency and
amplitude modulation) |
| R.54 |
Conventional degree of distortion tolerable for standardized
start-stop 50-baud systems |
| R.55 |
Conventional degree of distortion
|
| R.56 |
Telegraph distortion limits to be quoted in Recommendations for
equipment and transmission plans
|
| R.57 |
Standard limits of transmission quality for planning
code-independent international point-to-point telegraph
communications and switched networks using 50-baud start-stop
equipment |
| R.58 |
Standard limits of transmission quality for the gentex and telex
networks |
| R.58bis |
Limits on signal transfer delay for telegraph, telex and gentex
networks |
| R.59 |
Interface requirements for 50-baud start-stop telegraph
transmission in the maritime mobile satellite service
|
| R.60 |
Conditions to be fulfilled by regenerative repeaters for
start-stop signals of International Telegraph Alphabet No. 2
|
| R.62 |
Siting of regenerative repeaters in international telex circuits
|
| R.70 |
Designation of international telegraph circuits
|
| R.70bis |
Numbering of international VFT channels
|
| R.71 |
Organization of the maintenance of international telegraph
circuits |
| R.72 |
Periodicity of maintenance measurements to be carried out on the
channels of international VFT systems
|
| R.73 |
Maintenance measurements to be carried out on VFT systems
|
| R.74 |
Choice of type of telegraph distortion-measuring equipment
|
| R.75 |
Maintenance measurements on code-independent international
sections of international telegraph circuits
|
| R.75bis |
Maintenance measurements of character error rate on
international sections of international telegraph circuits
|
| R.76 |
Reserve channels for maintenance measurements on channels of
international VFT systems |
| R.77 |
Use
of bearer circuits for voice-frequency telegraphy
|
| R.78 |
Pilot
channel for AMVFT systems |
| R.79 |
Automatic tests of transmission quality on telegraph circuits
between switching centres |
| R.80 |
Causes of disturbances to signals in VFT channels and their
effect on telegraph distortion |
| R.81 |
Maximum acceptable limit for the duration of interruption of
telegraph channels arising from failure of the normal power
supplies |
| R.82 |
Appearance of false calling and clearing signals in circuits
operated by switched teleprinter services
|
| R.83 |
Changes of level and interruptions in VFT channels
|
| R.90 |
Organization for locating and clearing faults in international
telegraph switched networks |
| R.91 |
General maintenance aspects for the maritime satellite telex
service |
| R.100 |
Transmission characteristics of international TDM links
|
| R.101 |
Code
and speed dependent TDM system for anisochronous telegraph and
data transmission using bit interleaving
|
| R.102 |
4800
bit/s code and speed dependent and hybrid TDM systems for
anisochronous telegraph and data transmission using bit
interleaving |
| R.103 |
Code
and speed-dependent TDM 600 bit/s system for use in
point-to-point or branch-line muldex configurations
|
| R.105 |
Duplex muldex concentrator, connecting a group of gentex and
telex subscribers to a telegraph exchange by assigning virtual
channels to time slots of a bit-interleaved TDM system
|
| R.106 |
Muldex unit for telegraph and low speed data transmission using
TDM bit interleaving with an aggregate bit rate higher than 4800
bit/s |
| R.111 |
Code
and speed independent TDM system for anisochronous telegraph and
data transmission |
| R.112 |
TDM
hybrid system for anisochronous telegraph and data transmission
using bit interleaving |
| R.113 |
Combined muldex for telegraphy and synchronous data transmission
|
| R.114 |
Numbering of international TDM channels
|
| R.115 |
Maintenance loops for TDM-systems
|
| R.116 |
Maintenance tests to be carried out on international TDM systems
|
| R.117 |
End-to-end error performance for telegraph, telex and gentex
connections involving regenerative equipment
|
| R.118 |
Performance and availability monitoring in regenerative TDM
|
| R.120 |
Tolerable limits for the degree of isochronous distortion of
code-independent telegraph circuits operating at modulation
rates of 75, 100 and 200 bauds |
| R.121 |
Standard limits of transmission quality for start-stop user
classes of service 1 and 2 on anisochronous data networks
|
| R.122 |
Summary of transmission plans for rates up to 300 bauds
|
| R.140 |
Definitions of essential technical terms in the field of
telegraph transmission |
| R.150 |
Automatic protection switching of dual diversity bearers
|
