udp keepalive

Last Updated : Jun 01, 2021 |

Configures the timer after which, the gateway sends an RTP packet if no data is sent over a VoIP media channel. When the gateway is in Edge Mode and data traffic is light, the gateway must send UDP Keep-Alive messages to keep the NAT connection open for incoming RTP encoded media streams. Audio and non-audio links are covered in the VoIP media channels. For non-audio media streams, edge gateway supports the following categories:

  • RFC 4040 Clear channel data

  • T.38 Fax data

  • V.150.1 IP Modem relay data

Note:

This command is applicable when the gateway is in Edge Mode.

Syntax

udp keepalive [timer value]

Parameters

Parameter

Description

Possible Values

Default Value

timer value

Length of the timer window for sending null RTP packets.

10 - 300 seconds

15 seconds
Note:

When you execute the command without a [timer value], the current administered value is displayed on the CLI.

User level

Administrator: read-write

End-user: read-only

Context

general