D channel (delta channel) is a telecommunications term which refers to the ISDN channel in which the control and signalling information is carried.^[1]

This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these messages)

You can help expand this article with text translated from the corresponding article in German. (September 2017) Click [show] for important translation instructions.

Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia.
Consider adding a topic to this template: there are already 1,778 articles in the main category, and specifying|topic= will aid in categorization.
Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article.
You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing German Wikipedia article at [[:de:D-Kanal]]; see its history for attribution.
You may also add the template {{Translated|de|D-Kanal}} to the talk page.
For more guidance, see Wikipedia:Translation.

This article relies largely or entirely on a single source. (August 2009)

The bit rate of the D channel of a basic rate interface is 16 kbit/s, whereas it amounts to 64 kbit/s on a primary rate interface.

For DSS1 signalling, the D channel layer 2 protocol is Q.921 also called LAPD and it carries Layer 3 messages according to Q.931 protocol.

See also

References