| Características técnicas de los tonos para el servicio telefónico |
 |
|
| Citation: |
https://handle.itu.int/11.1002/1000/430 |
| Series title: |
E series: Overall network operation, telephone service, service operation and human factors
E.100-E.229: International operation
E.180-E.189: Tones in national signalling systems
Q series: Switching and signalling, and associated measurements and tests
Q.4-Q.59: International automatic and semi-automatic working
Q.35-Q.39: Tones for use in national signalling systems |
| Approval date: |
1988-11-25 |
| Approval process: | WTSA |
|
Status: |
Superseded |
| Observation: | This Recommendation is also published under the alias number Q.35 |
|
Maintenance responsibility: |
ITU-T Study Group 21 |
|
Further details: |
Patent statement(s)
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ITU-T Supplement
|
Title
|
Status
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Summary
|
Table of contents
|
Download
|
|
E-100 series Suppl. 1 (02/2019)
|
ITU-T E.100 series – Framework of disaster management for disaster relief system
|
In force
|
here
|
here
|
here
|
|
E Suppl. 11 (06/2020)
|
Criteria for M2M/IoT-related assignments under Recommendation ITU-T E.164.1 and Recommendation ITU-T E.212 Annex A
|
In force
|
here
|
here
|
here
|
| Title |
Approved on |
Download |
|
Radio fequency-level based single-number indicator for mobile network usefulness for a given range of applications
|
2023
|
here
|
|
Technical Report on analysis of ITU-T F.930
|
2020
|
here
|
|
Identify call location for emergency service
|
2020
|
here
|
|
