RFC 3573

Signalling of Modem-On-Hold status in Layer 2 Tunneling Protocol (L2TP), July 2003

Canonical URL:
https://www.rfc-editor.org/rfc/rfc3573.txt
File formats:
Plain TextPDF
Status:
PROPOSED STANDARD
Author:
I. Goyret
Stream:
IETF
Source:
l2tpext (int)

Cite this RFC: TXT  |  XML

DOI:  10.17487/RFC3573

Discuss this RFC: Send questions or comments to l2tpext@ietf.org

Other actions: Submit Errata  |  Find IPR Disclosures from the IETF


Abstract

The Layer 2 Tunneling Protocol (L2TP) defines a mechanism for tunneling Point-to-Point Protocol (PPP) sessions. It is common for these PPP sessions to be established using modems connected over the public switched telephone network. One of the standards governing modem operation defines procedures that enable a client modem to put the call on hold and later, re-establish the modem link with minimal delay and without having to redial. While the modem call is on hold, the client phone line can be used to place or receive other calls. The L2TP base protocol does not provide any means to signal these events from the L2TP Access Controller (LAC), where the modem is physically connected, to the L2TP Network Server (LNS), where the PPP session is handled. This document describes a method to let the LNS know when a client modem connected to a LAC has placed the call on hold. [STANDARDS-TRACK]


For the definition of Status, see RFC 2026.

For the definition of Stream, see RFC 4844.


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