Specifications

Packetization Time Reference Manual (MGCP/NCS Version)
Mediatrix 4100
137
Packetization Time
The packetization time (also called packetization period or ptime) is the duration, in ms, of the voice packet.
 To set the packetization time:
1. In the voiceIfMIB, set the packetization time of the codec(s) as required (voiceIfCodecTable).
Available values vary from one codec to another.
Table 100: Packetization Time Settings
Variable Definition Values (ms)
PCMU (G.711 u-Law)
voiceIfCodecPcmuMinPTime Shortest packetization period allowed for the
PCMU codec. Authorized values start at
10 ms and come in discrete steps of 10 ms up
to the one specified by the
voiceIfCodecPcmuMaxPTime variable.
Default Value: 10
10-100, with increments
of 10
voiceIfCodecPcmuMaxPTime Longest packetization period allowed for the
PCMU codec. Authorized values go up to
100 ms, in discrete steps of 10 ms, and start at
the one specified by the
voiceIfCodecPcmuMinPTime variable.
Default Value: 100
10-100, with increments
of 10
PCMA (G.711 a-Law)
voiceIfCodecPcmaMinPTime Shortest packetization period allowed for the
PCMA codec. Authorized values start at
10 ms and come in discrete steps of 10 ms up
to the one specified by the
voiceIfCodecPcmaMaxPTime variable.
Default Value: 10
10-100, with increments
of 10
voiceIfCodecPcmaMaxPTime Longest packetization period allowed for the
PCMA codec. Authorized values go up to
100 ms, in discrete steps of 10 ms, and start at
the one specified by the
voiceIfCodecPcmaMinPTime variable.
Default Value: 100
10-100, with increments
of 10
G.723
voiceIfCodecG723MinPTime Shortest packetization period allowed for the
G.723 codec. Authorized values start at 30 ms
and come in discrete steps of 30 ms up to the
one specified by the
voiceIfCodecG723MaxPTime variable.
Default Value: 30
30, 60, 90, 120
voiceIfCodecG723MaxPTime Longest packetization period allowed for the
G.723 codec. Authorized values go up to
120 ms, in discrete steps of 30 ms, and start at
the one specified by the
voiceIfCodecG723MinPTime variable.
Default Value: 120
30, 60, 90, 120