Message Waiting Indicator
- Message Waiting Indicator
Message Waiting Indicator (MWI) in telephony, is a Bellcore term for an FSK-based telephone calling feature that illuminates an LED on select telephones to notify a telephone user of waiting voicemail messages on most North American public telephone networks and PBXs.
This technology was introduced in 1995, with the introduction of CLASS-based calling features and ADSI. It was at one time, only compatible with ADSI-compliant telephones but is now compatible with any Customer Premises Equipment (CPE) that simply responds visually to visual FSK.
This service is often erroneously associated with the abilities of most Caller ID standalone set-top boxes. Caller ID boxes manufactured after 1998, feature an LED that blinks green to notify that new calls have been recorded and red to indicate that a subscriber has new voicemail messages waiting. Some units will also display the text "MESSAGE WAITING" (similar to ADSI-compliant telephones). It should be noted that these units do not use Visual FSK to activate their red LEDs, but instead, they briefly "pick-up" the line at certain intervals (normally, within 2 minutes of a new call) to check for a "stuttered" dial tone." The presence of a stutter dial tone will activate a red LED; while absence will de-activate it.
External links
* [http://telecom-info.telcordia.com/site-cgi/ido/newcust.pl?page=idosearch&docnum=GR-1401& Message Waiting Indicator technical details by Bellcore (Telcordia)] , $455.
Wikimedia Foundation.
2010.
Look at other dictionaries:
Message-waiting indicator — A message waiting indicator (MWI) in telephony, is a Telcordia Technologies (formerly Bellcore) term for an FSK based telephone calling feature that illuminates an LED on select telephones to notify a telephone user of waiting voicemail messages… … Wikipedia
Simplified Message Desk Interface — (SMDI) is a protocol that defines the interface between a voice mail system and a phone system such as a PBX or Public Telephone Switch. It was developed by Bell Labs. It is used to provide the voice mail system the information it needs to… … Wikipedia
MWI — Message Waiting Indicator (Computing » Assembly) Message Waiting Indicator (Computing » Networking) * Many Worlds Interpretation (Academic & Science » Physics) * Mediation Works Incorporated (Business » Firms) * Moving Water Industries (Business… … Abbreviations dictionary
MWI — Message Waiting Indicator ( > IEEE Standard Dictionary ) … Acronyms
MWI — Message Waiting Indicator ( > IEEE Standard Dictionary ) … Acronyms von A bis Z
Comparison of VoIP software — VoIP software is used to conduct telephone like voice conversations across Internet Protocol (IP) based networks. VoIP stands for Voice over IP . For residential markets, VoIP phone service is often cheaper than traditional public switched… … Wikipedia
UMWI — Unprocessed Message Waiting Indicator (Computing » Networking) **** Unprocessed Message Waiting Indicator (Computing » Assembly) … Abbreviations dictionary
MWI — can mean:*Republic of Malawi *Many worlds interpretation in quantum mechanics *Message Waiting Indicator *Message Waiting Indication for the Session Initiation Protocol (SIP) (RFC 3842) as mentioned in the sipX article *MWI an abbreviation for… … Wikipedia
Dial tone — For the G.I. Joe character, see Dial Tone (G.I. Joe). A dial tone (known in the British Isles as a dialling tone)[1] is a telephony signal used to indicate that the telephone exchange is working, has recognized an off hook, and is ready to accept … Wikipedia
Analog Display Services Interface — is a telephony technology that is currently used in POTS or computer based PBX telephone service. It works in conjunction with a screen based telephone ( screenphone ) or other compatible CPE to provide the user with softkey access to telephone… … Wikipedia
