CISCO-VISM-CODEC-MIB

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This table defines the DSP templates that are applicable on a card basis. It defines the set of codecs supported in each template and the maximum number of DS0s supported on the VISM card for a given template.

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An entry is defined for each set of codecs supported. The codecs supported are a combination of : G.711Mu (PCM - Mu-law) G.711A (PCM - A-law) G.726/32 (ADPCM) G.729a (CS-ACELP - Annex A) G.729ab (CS-ACELP - Annex B) clearChannel (clear channel voice) G.723.1-H G.723.1a-H G.723.1-L G.723.1a-L Lossless

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This attribute defines the index for the CodecTemplate table. Template number is input at the time of configuring a template using 'cncodectmpl' CLI command.

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This attribute represents a bit map of Codecs supported in this template. Bit 0 - represents the G.711 Mu-law codec. Bit 1 - represents the G.711 A-law codec. Bit 2 - represents the G.726 at rate 32 kbps. Bit 3 - represents the G.729a codec. Bit 4 - represents the G.729ab codec. Bit 5 - represents clear channel. Bit 6 - represents the G.726 at rate 16 kbps Bit 7 - represents the G.726 at rate 24 kbps Bit 8 - represents the G.726 at rate 40 kbps Bit 9 - Internal use (T.38) Bit 10 - represents the G.723.1-H codec. Bit 11 - represents the G.723.1a-H codec. Bit 12 - represents the G.723.1-L codec. Bit 13 - represents the G.723.1a-L codec. Bit 14 - represents the Lossless codec.

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The maximum number of channels supported for this template.

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This table contains configuration information about different codecs and their packetization periods.

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An entry in the vismCodecCnfTable contains packetization period information for a specific codec. These entries are created by the agent when the card comes up with appropriate default values and the user can modify the packetization period for a particular codec any point in time.

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This object is an index to this table. 1 represents G.711u 2 represents G.711a 3 represents G.726 at rate 32 kbps 4 represents G.729a 5 represents G.729ab 6 represents clear channel 7 represents G.726 at rate 16 kbps 8 represents G.726 at rate 24 kbps 9 represents G.726 at rate 40 kbps 10 RESERVED 11 represents G.723.1-H at rate 6.4kbps 12 represents G.723.1a-H at rate 6.4kbps with SID 13 represents G.723.1-L at rate 5.3kbps 14 represents G.723.1a-L at rate 5.3kbps with SID 15 represents Lossless

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This object holds the name of a codec. For example, index 1 will have G.711u as the codec name index 2 will have G.711a as the codec name and so on.

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This object gives the packetization period for a particular codec. for G.711u allowed values are 10 & 20 for G.711a allowed values are 10 & 20 for G.726 at 32 kbps allowed values are 10, 20, 30 & 40 for G.729a allowed values are 10, 20, 30 & 40 for G.729ab allowed values are 10, 20, 30 & 40 for clear channel allowed values are 10 and 20 for G.726 at 16 kbps allowed values are 10, 20, 30 & 40 for G.726 at 14 kbps allowed values are 10, 20, 30 & 40 for G.726 at 40 kbps allowed values are 10, 20, 30 & 40 for G.723 allowed values are 30 & 60 for Lossless allowed values are 10 and 20 Default value for G.723 is 30, for other codecs it is 10.

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This object contains the user configured preference for each codec. Lower the number, higher the preference of the codec. If the call agent does not specify the preferred codec list in CRCX(CreateConnection) request then the codec used will be the one of highest preference, as configured in this object. The default preference based on the codec type is G729ab will have preference 1 G729a will have preference 2 G726 at rate 16 kbps will have preference 3 G726 at rate 24 kbps will have preference 4 G726 at rate 32 kbps will have preference 5 G726 at rate 40 kbps will have preference 6 G.711u will have preference 7 for T1 and will have preference 8 for E1 G.711a will have preference 7 for E1 card and will have preference 8 for T1 clearChannel will have preference 9 G723H will have preference 10 G723AH will have preference 11 G723L will have preference 12 G723AL will have preference 13 Lossless will have preference 14 If the preference of a codec is zero then that codec will not be used.

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The local connection option or SDP(Session Description Protocol) descriptor string that VISM would get from the call agent for the codec to be used will be in the form of PCMU, PCMA, G726 at rate 32 kbps, G729a, CCD ..... where in PCMU stands for G711u PCMA stands for G711a and CCD stands for clear channel This object serves as a mapping string, and VISM will use the value configured in this object to match the SDP descriptor string obtained for a codec in a CRCX or MDCX(ModifyConnection) message. Since the entries in this table are implicitly created by default the entry with codec = G.711u will have a value of PCMU G.711a will have a value of PCMA clear channel will have a value of CCD G.726 at rate 32 kbps will have G726 at rate 32 kbps G.726 at rate 16 kbps will have G726 at rate 16 kbps G.726 at rate 24 kbps will have G726 at rate 24 kbps G.726 at rate 40 kbps will have G726 at rate 40 kbps G.729a will have G729a G.729ab will have G729ab G.723.1-H will have G723H G.723.1a-H will have G723AH G.723.1-L will have G723L G.723.1a-L will have G723AL Lossless will have Lossless

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This object specifies the payload types (PT) of a codec. PT numbers for CODECS are assigned by IANA(Internet assigned number Authority). If in a SDP string we would just receive an IANA type number and not the codec string, then VISM would use the value in this object to derive the actual codec to be used in the bearer path.

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This is an alternate codec string to that specified in vismCodecString. This object will also serve as a mapping string along with the vismCodecString object and the VISM will use the value in these objects to match the SDP descriptor string obtained for a codec in a CRCX or MDCX(ModifyConnection) message. If alternate codec strings need to be configured, this object will need to be configured first. The local connection option or SDP(Session Description Protocol) descriptor string that VISM would get from the call agent for the codec to be used will be in the form of PCMU, PCMA, G726 at rate 32 kbps, G729a, CCD ..... where in PCMU stands for G711u PCMA stands for G711a and CCD stands for clear channel This is an optional parameter which, if not configured, has a default value as specified.

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This is an alternate codec string to that specified in vismCodecString and vismAltCodecString1. This object will also serve as a mapping string along with the vismCodecString and vismAltCodecString1 objects and the VISM will use the value in these objects to match the SDP descriptor string obtained for a codec in a CRCX or MDCX(ModifyConnection) message. If alternate codec strings needs to be configured, this object will need to be configured second after vismAltCodecString1. The local connection option or SDP(Session Description Protocol) descriptor string that VISM would get from the call agent for the codec to be used will be in the form of PCMU, PCMA, G726 at rate 32 kbps, G729a, CCD ..... where in PCMU stands for G711u PCMA stands for G711a and CCD stands for clear channel This is an optional parameter which, if not configured, has a default value as specified.

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This is an alternate codec string to that specified in vismCodecString vismAltCodecString1 and vismAltCodecString2. This object will also serve as a mapping string along with the vismCodecString, vismAltCodecString1 and vismAltCodecString2 objects and the VISM will use the value in these objects to match the SDP descriptor string obtained for a codec in a CRCX or MDCX(ModifyConnection) message. If alternate codec strings need to be configured, this object will need to be configured third after vismAltCodecString1 and vismAltCodecString2. The local connection option or SDP(Session Description Protocol) descriptor string that VISM would get from the call agent for the codec to be used will be in the form of PCMU, PCMA, G726 at rate 32 kbps, G729a, CCD ..... where in PCMU stands for G711u PCMA stands for G711a and CCD stands for clear channel This is an optional parameter which, if not configured, has a default value as specified.

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