Configuring Fast Connection And Tunneling; Configuring Dtmf Transmission - 3Com MSR 50 Series Configuration Manual

2272 C 132: V
HAPTER OICE
Configuring DTMF
Transmission
n
Configuring Fast
Connection and
Tunneling
E C
NTITY ONFIGURATION
To do...
Enter voice dial program view dial-program
Create a VoIP entity and enter
VoIP entity view
Configure the codec on basis
of the priority levels
Configure the voice
packetization period for
different codecs
Configure voice entity
description
Follow these steps to configure the out-of-band DTMF transmission:
To do...
Enter system view
Enter voice view
Enter voice dial program view dial-program
Create a VoIP entity and enter
VoIP entity view
Configure the out-of-band
DTMF transmission mode
Configure the value of the
payload type used by NTE
For precautions, refer to
Fast connection and tunneling
According to the specification of H.225.0 recommendation, fast connection
■
means that a Setup, CallProceeding, Alerting, or Connect message carries a
standard H.245 message (e.g., Open Logical Channel message) so that an
RTP/RTCP voice channel can be established before the gateway (GW) receives a
Connect message, avoiding H.245 message exchange on TCP connection, and
thereby shortening connection time. There is no capability negotiation process
in fast connection mode, so the capability of both parties is determined by the
terminating GW. When fast connection is enabled, a Setup message sent from
the originating GW carries locally supported codecs. After receiving this
message, the terminating GW selects one suitable codec to notify the
originating GW through a CallProceeding, Alerting, or Connect message. In
this way, both parties adopt this codec for communication.
Use the command...
entity entity-number voip
compression { 1st-level |
2nd-level | 3rd-level |
4th-level } { g711alaw |
g711ulaw | g723r53 |
g723r63 | g726r16 | g726r24
| g726r32 | g726r40 | g729a |
g729r8 }
payload-size { g711 | g723 |
g726r16 | g726r24 | g726r32
| g726r40 | g729 }
time-length
description string
Use the command...
system-view
voice-setup
entity entity-number voip
outband { h225 | h245 |
nte }
rtp payload-type nte value
"Configuring DTMF Transmission" on page
Remarks
-
-
Optional
By default, the highest codec
is g729r8, the second highest
is g711alaw, the third
highest is g711ulaw, and the
lowest is g723r53.
The support for the g723
codec varies with devices.
Optional
20 milliseconds for a G.711
codec, and 30 milliseconds for
G.723, G.726, and G.729
codecs by default.
Optional
No description default.
Remarks
-
-
-
-
Optional
By default, the inband DTMF
transmission is configured.
Optional
101 by default.
2269.