mail us  |  mail this page

contact us
training  | 
tech stuff  | 

Tech Stuff - Ring Patterns North America & Europe

North America

The following is a list of commonly used ring patterns (or cadences to use the techno-jargon) in North America (defined in ANSI T1.401-1988 section 5.4.2). It uses a 20Hz frequency and voltage depends on distance from the central office (exchange) and will vary from 40 to 150V rms.

Name Pattern/Cadence
Ringing (Code 1) 2 sec on, 4 sec off, repeating
Coded Ringing (Code 2) 1 sec on, 1 sec off, 1 sec on, 3 sec off, repeating
Distinctive Power ringing Short (200 - 500ms), long (800 - 1000ms), short (200 - 500ms) in a 6 second period, repeating
Special ringing two short (400 - 500ms) long (800 - 1000ms)

Notes:

  1. REN - is Ringer Equivalence Number and defines the number of standard AT&T 500 series telephones (500 set) that can ring simultaneously. This values is normally 5 but can lie in the range 3 - 5.

Europe

The European stand ring pattern (or cadences to use the techno-jargon) is shown below (defined in ETSI prTS Interface Spec V0.0.2 (2004-11) TR41.1-05-02-010 / TR41.1.1-05-02-006 ). It uses a 25Hz (some operate at 50Hz) frequency and voltage depends on distance from the exchange) and will vary from 35 to 100V rms. This is the harmonized standard and many countries may have local variants.

Name Pattern/Cadence
Normal Ringing 1 sec on, 4 sec off, repeating


Problems, comments, suggestions, corrections (including broken links) or something to add? Please take the time from a busy life to 'mail us' (at top of screen), the webmaster (below) or info-support at zytrax. You will have a warm inner glow for the rest of the day.

Tech Stuff

RSS Feed Icon

If you are happy it's OK - but your browser is giving a less than optimal experience on our site. You could, at no charge, upgrade to a W3C standards compliant browser such as Firefox

Search

web zytrax.com

Share

Icons made by Icomoon from www.flaticon.com is licensed by CC 3.0 BY
share page via facebook tweet this page

Page

email us Send to a friend feature print this page Display full width page Decrease font size Increase font size

Standards

ISO (International)
IEC (International)
ANSI (US)
DIN (Germany)
ETSI (EU)
BSI (UK)
AFNOR (France)

Telecom

TIA (US)
ECIA (US)
ITU (International)
IEEE (US)
ETSI (EU)
OFCOM (UK)

Internet

IETF
IETF-RFCs
IANA
ICANN
W3C

Electronics

JEDEC
ECIA (US)

Site

CSS Technology SPF Record Conformant Domain
Copyright © 1994 - 2024 ZyTrax, Inc.
All rights reserved. Legal and Privacy
site by zytrax
hosted by javapipe.com
web-master at zytrax
Page modified: January 20 2022.