Guard tone
id:
guard-tone-317-6968998
title:
Guard tone
text:
Guard tone is a feature of wireline modems. The guard tone is sent by the answering modem after it has sent the answer tone. It is a single continuous tone with a frequency of either 1800 Hz or 550 Hz, sent at a level of -6dB or -3dB, respectively, below the level of the transmitted data signal power. It is used with V.22 and V.22bis modulation modes to prevent the high-band data signal from interfering with the operation of billing apparatus in certain countries where in-band signalling was com
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Guard_tone
date created:
date modified:
2023-02-18T00:37:44Z
main entity:
{"identifier":"Q5613984","url":"https://www.wikidata.org/entity/Q5613984"}
image:
fields total:
13
integrity:
13