The system displays the IP Media Parameters screen.
In the Audio Codec field, specify an audio CODEC.
In the Silence Suppression field, perform one of the following tasks:
If you want to avoid silence suppression, type n.
If you require silence suppression on the audio stream, type y.
Silence suppression can affect audio quality.
In the Frames per Pkt field, specify frames for each packet.
The frame value can be between 1 to 6.
The system displays the Packet Size (ms) field automatically.
In the Media Encryption field, specify an option for the negotiation of encryption.
The system displays this field only if the Media Encryption over IP feature is enabled. The system specifies one of the five possible options for the negotiation of encryption. The selected option for an IP codec set applies to all codecs defined in that set.
Go to page 2 of the screen.
Note:
Use these approximate bandwidth requirements to decide which codecs to administer. These numbers change with packet size and include layer 2 overhead. With 20 ms packets, the following bandwidth is required:
711 A-law–85 kbps
711 mu-law–85 kbps, used in the U.S. and Japan
729–30 kbps
729A/B/AB–30 kbps audio
OPUS Codec bit-rate options:
OPUS-NB12K : 12 kbps
OPUS-NB16K : 16 kbps
OPUS-WB20K: 20 kbps
OPUS-SWB24: 24 kbps
In the All Direct-IP Multimedia? field, type y for direct multimedia through the following codecs:
H.261
H.263
H.264 (video)
H.224
H.224.1 (data, far end camera control)
In the Maximum Bandwidth Per Call for Direct-IP Multimedia field, enter the unit of measure corresponding to the numeric value entered for the bandwidth limitation. The unit of measure can be kbits or mbits.
The system displays this field only when Allow Direct-IP Multimedia is y.
In the FAX Mode field, specify the mode for fax calls.
In the Modem Mode field, specify the mode for modem calls.
In the TDD/TTY Mode field, specify the mode for TDD/TTY calls.
In the Clear Channel field, type y or n.
If the value is y, 64 kbps clear channel data calls is possible for this codec set.
If the value is n, 64 kbps clear channel data calls is not possible for this codec set.
In the Redundancy field, perform one of the following:
For call types TTY, fax, or modem that do not use pass-through mode: Enter the number of duplicated packets, from 0 to 3, that the system sends with each primary packet in the call. A value of 0 means that you do not want to send duplicated packets.
For clear-channel call type and call types for which you selected the pass-through mode: Enter either 0 or 1. If you select 0, the system does not use redundant payloads. If you select 1, the system uses redundant payloads.
In the Media Connection IP Address Type Preferences field, enter any of the following:
ipv4/ipv6
ipv6/ipv4
ip4/none
ipv6/none
Save the changes.
Type any of the following and press Enter:
list ip-codec-set
list ip-media-parameters
The system lists all codec sets on the CODEC Set screen.
