CSCF Enforce Codec Policy Configuration Mode Commands

The CSCF Enforce Codec Policy Configuration Mode is used to manage audio and video codec policies within the system. The parameters defined in this chapter are derived from IETF RFC 3551: “RTP Profile for Audio and Video Conferences with Minimal Control”.

IMPORTANT:

The commands or keywords/variables that are available are dependent on platform type, product version, and installed license(s).

dynamic-codec

Creates a list of dynamic codecs supported by the system.

Platform:

ASR 5000

Product:

SCM


Privilege:

Administrator


Syntax 
dynamic-codec { audio encoding_name | video encoding_name } [ clock_rate ] [ channels ]default dynamic-codecno dynamic-codec [ encoding_name ] [ clock_rate ]  [ channels ]
default

Specifies that the default list of dynamic codecs is added to the allowed codecs list. Default dynamic codecs: H263 and AMR.

no

Specifies that all dynamic codecs are removed from the allowed codecs list. If an encoding_name is specified, then only the codec specified by the encoding_name is removed. Furthermore, if a supporting clock_rate and/or channels are specified, then only the encoding_name with the specified clock_rate and/or channels is removed.

audio encoding_name | video encoding_name

audio encoding_name: Specifies the encoding name of the dynamic audio codec added to the allowed codec list. encoding_name must be from 1 to 49 alpha and/or numeric characters.

video encoding_name: Specifies the encoding name of the dynamic video or audio-video codec added to the allowed codec list. encoding_name must be from 1 to 49 alpha and/or numeric characters.

[ clock_rate ] [ channels ]

clock_rate: Specifies the sampling rate of the codec. clock_rate must be an integer from 0 to 1000000.

channels: Specifies the number of channels required by the codec. channels must be an integer from 1 to 1000000.

Valid dynamic audio codecs:

Encoding Name Clock Rate (Hz) Channels

G726-40

8,000

1

G726-32

8,000

1

G726-24

8,000

1

G726-16

8,000

1

G729D

8,000

1

G729E

8,000

1

GSM-EFR

8,000

1

L8

Variable

Variable

RED

See RFC3551

VDVI

Variable

1


Valid dynamic video codecs:

Encoding Name Clock Rate (Hz)

H263-1998

90,000



Usage:

Use this commands to create a list of supported dynamic audio and video codecs in the system. When a request is received by the CSCF, the SDP fields in the message are checked to determine the codec being used. The codec in the SDP fields must match a codec in the allowed codec list or the CSCF rejects the request.


Example:
The following command adds the GSM-EFR codec to the allowed dynamic codec list:
dynamic-codec GSM-EFR
end

Exits the current mode and returns to the Exec Mode.

Product:

All


Privilege:

Administrator


Syntax 
end

Usage:

Change the mode back to the Exec mode.

exit

Exits the current mode and returns to the previous mode.

Product:

All


Privilege:

Administrator


Syntax 
exit

Usage:

Return to the previous mode.

static-codec

Creates a list of static codecs supported by the system.

Platform:

ASR 5000

Product:

SCM


Privilege:

Administrator


Syntax 
static-codec { audio payload_type | video payload_type }default static-codecno static-codec [ payload_type ]
default

Specifies that the default list of static codecs is added to the allowed codecs list.

The default static codec is 5: DVI4.

no

Specifies that all static codecs are removed from the allowed codecs list. If a payload_type is specified, then only the codec specified by the payload_type is removed.

audio payload_type | video payload_type

audio payload_type: Specifies the audio codec added to the allowed codecs list. payload_type must be an integer from 0 to 95. Default value is 5.

Valid static audio codecs:

0: PCMU

7: LPC

14: MPA

21: unassigned

1: reserved

8: PCMA

15: G728

22: unassigned

2: reserved

9: G722

16: DVI4

23: unassigned

3: GSM

10: L16

17: DVI4

4: G723

11: L16

18: G729

5: DVI4

12: QCELP

19: reserved

6: DVI4

13: CN

20: unassigned



video payload_type: Specifies the video or audio-video codec added to the allowed codecs list. payload_type must be an integer from 0 to 95. Default value is 5.

Valid static video codecs:

24: unassigned

28: nv

32: MPV

72-76: reserved

25: CelB

29: unassigned

33: MP2T

77-95: unassigned

26: JPEG

30: unassigned

34: H263

27: unassigned

31: H261

35-71: unassigned




Usage:

Use this commands to create a list of supported static audio and video codecs in the system. When a request is received by the CSCF, the SDP fields in the message are checked to determine the codec being used. The codec in the SDP fields must match a codec in the allowed codec list or the CSCF rejects the request.


Example:
The following command adds the G729 audio codec to the allowed codecs list:
static-codec 18