Cisco Systems VR-561 manual Sequence-numbers No sequence-numbers, VR-592

Cisco IOS Voice, Video, and Fax Commands: R Through Sh

sequence-numbers

sequence-numbers

Syntax Description

Defaults

Command Modes

Command History

To enable the generation of sequence numbers in each frame generated by the digital signal processor (DSP) for Voice over Frame Relay applications, use the sequence-numberscommand in dial-peer configuration mode. To disable the generation of sequence numbers, use the no form of this command.

sequence-numbers

no sequence-numbers

This command has no arguments or keywords.

Disabled

Dial-peer configuration

Release	Modification
12.0(3)XG	This command was introduced on the Cisco 2600 and 3600 series
	routers and the Cisco MC3810 multiservice concentrator.
12.0(4)T	This command was integrated into the Cisco IOS Release 12.0(4)T.

Usage Guidelines	Sequence numbers on voice packets allow the digital signal processor (DSP) at the playout side to detect
	lost packets, duplicate packets, or out-of-sequence packets. This helps the DSP to mask out occasional
	drop-outs in voice transmission at the cost of one extra byte per packet. The benefit of using sequence
	numbers versus the cost in bandwidth of adding an extra byte to each voice packet on the Frame Relay
	network must be weighed to determine whether to disable this function for your application.
	Another factor to consider is that this command does not affect codecs that require a sequence number,
	such as G.726. If you are using a codec that requires a sequence number, the DSP will generate one
	regardless of the configuration of this command.
Examples	The following example shows how to disable the generation of sequence numbers for VoFR frames on a
	Cisco 2600 series or 3600 series router or on a Cisco MC3810 multiservice concentrator for VoFR dial
	peer 200, starting from global configuration mode:
	dial-peer voice 200 vofr
	no sequence-numbers

Cisco IOS Voice, Video, Fax Command Reference

VR-592