[M.810] Recommendation M.810 (11/88) - Setting up and lining up an international voice-frequency telegraph link for public telegraph circuits (for 50, 100 and 200 baud modulation rates)
Availability:
Electronic Bookshop
Subscription Service (ITU-T Recommendations Online)
Price:20
CHF (Swiss Francs)
To purchase Electronic Bookshop items select the document and click on the
button Add to Basket
View
or Download Document
| | Table of Contents | ITU-T Rec. M.810 - SETTING UP AND LINING UP AN INTERNATIONAL VOICE-FREQUENCY TELEGRAPH LINK FOR PUBLIC TELEGRAPH CIR
NOTES
SETTING UP AND LINING UP AN INTERNATIONAL VOICE-FREQUENCY TELEGRAPH LINK FOR PUBLIC TELEGRAPH CIRCUITS (FOR 50, 100 AND 200 BAUD MODULATION RATES)
1 Designation of control stations
2 Organization
3 Setting up and lining up a voice-frequency telegraph link
4 Limits for the overall loss of a voice-frequency telegraph link
4.1 Nominal overall loss at 1020 Hz
4.2 Overall loss/frequency distortion
4.3 Change of overall loss due to a changeover to the reserve line or section
5 Measurement of noise voltage on a voice-frequency telegraph link
5.1 Uniform-spectrum random noise
5.2 Impulsive noise
6 Crosstalk
7 Group-delay/frequency distortion
8 Frequency error
9 Interference caused by power supply sources
10 Variation of overall loss with time
11 Amplitude hits, short interruptions in transmission and phase hits
Fascicle IV.2 - Rec. M.810
12 Record of results
13 Information concerning voice-frequency telegraph terminal equipment
14 Marking of circuits used for voice-frequency telegraphy
ANNEX A - Basic characteristics of telegraph equipments used in international voice-frequency telegraph systems
A.1 Limiting power per channel
A.2 Telegraph channel carrier frequencies
ANNEX B - Limits required by a bearer circuit for FMVFT application if the total power transmitted by all channels is set at 50
B.1 Loss/frequency distortion
B.2 Random noise
B.3 Impulsive noise
B.4 Error rates
B.5 Bearer length
References
|
Home | Search | Site Map | Help | Contact | Comments | © Copyright English | Français | Español Last Modified: Thu Apr 1 22:42:14 1999 | 
