Informacion

Annex to ITU Operational Bulletin No. 781 – 1.II.2003

INTERNATIONAL TELECOMMUNICATION UNION

TSB
TELECOMMUNICATION STANDARDIZATION BUREAU OF ITU

_______________________________________________________________

VARIOUS TONES USED IN NATIONAL NETWORKS (ACCORDING TO ITU-T RECOMMENDATION E.180)(03/1998)
(POSITION ON 1 FEBRUARY 2003)______________________________________________________________

Geneva, 2003

Various tones used in national networks Note by TSB 1. The List of various tones used in national networks has now been updated by replies received from various Administrations to TSB Circular 108 of 19 June 2002. 2. Administrations are reminded of the advantages of standardizing audible tones as far as possible so that subscribers and operators may quickly recognizeany tone transmitted of whatever origin. 3. In order to have current information and to keep the List up-to-date, Administrations are strongly requested to submit a concise technical description of any new or changed network tones to the ITU/TSB whenever such tones are introduced, by using the attached Notification form. 4. For your information, this list will be updated by numbered series ofamendments published in the ITU Operational Bulletin. Furthermore, the information contained in this Annex is also available on the ITU home page (www.itu.int/itu-t/bulletin/), and can be consulted by subscribers by remote access. 5. Please address any comments or any modifications concerning this List to the Director of the TSB: International Telecommunication Union Director of the TSB Place desNations CH-1211 GENEVA 20 Switzerland Tel: +41 22 730 5211 Fax: +41 22 730 5853 E-mail: tsbtson@itu.int 6. The designations employed and the presentation of material in this List do not imply the expression of any opinion whatsoever on the part of the ITU concerning the legal status of any country or geographical area, or of its authorities.

Annex to ITU OB 781-E

2

Various tones used innational networks
COUNTRY/TONE Albania (Republic of) Busy tone Congestion tone Dial tone Ringing tone Call waiting tone Algeria (People's Democratic Republic of) Busy tone Ringing tone Andorra (Principality of) Busy tone Congestion tone Dial tone Second dial tone Pay tone Ringing tone Special information tone Call waiting tone Angola (Republic of) Busy tone Congestion tone Dial tone Numberunobtainable tone Ringing tone Waiting tone Anguilla Busy tone Congestion tone Dial tone Recall dial tone Number unobtainable tone Payphone recognition tone Ringing tone Special information tone Warning tone - operator intervening Waiting tone Antigua and Barbuda Busy tone Congestion tone Dial tone Pay tone Ringing tone Special information tone Call waiting tone Argentine Republic Busy tone Congestion toneDial tone End of three party service tone Ringing tone Service activated tone Warning tone - operator intervening Waiting tone Call waiting tone Aruba Busy tone Confirmation tone Congestion tone Dial tone Refusal tone Ringing tone Special information tone Call waiting tone FREQUENCY in Hz CADENCE in seconds

425 425 425 425 425

0.5 on 0.5 off 0.2 on 0.2 off continuous 1.0 on 4.0 off 0.2 on0.2 off 0.2 on 1.4 off

425 425 425 425 425 425 1600 425 950/1400/1800 425 400 400 400 400 25 400 480+620 480+620 350+440 350+440 480+620 1600/1143 440+480 950/1400/1800 450 440 480+620 480+620 350+440 622 440+480 480 425 425 425 950/1400/1800 425 425 1400 425 425 425 425 425 425 425 425 950/1400/1800 425

0.5 on 0.5 off 1.5 on 3.5 off 0.2 on 0.2 off 2x(0.2 on 0.2 off) 0.2 on 0.2 off continuouscontinuous 0.05 on 0.05 off 0.05 on 0.05 off 1.5 off 1.5 on 3.0 off 3x0.333 on 1.0 off 0.175 on 0.175 off 0.175 on 3.5 off 0.5 on 0.5 off 0.5 on 0.5 off continuous 0.2 on 0.2 off 1.0 on 5.0 off 1.0 on 5.0 off 0.5 on 0.5 off 0.25 on 0.25 off continuous 3x(0.1 on 0.1 off) + continuous 0.25 on 0.25 off 0.2 on 0.2 off 0.2 on 2.0 off 2.0 on 4.0 off 3x0.33 on 1.0 off 0.2 on 0.2 off 0.65 on 0.2 off...