The following table lists all sub-fields in Ingress and Egress Codec Type fields. A colon character (":") separates sub-field 1 from 2 and separates 2 from 3.
The Codec Type string is always six (6) characters, including both colons.
| Note |
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| Circuit calls are always codec type G.711. |
Codec Type Sub-fields
| Caption |
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| 0 | Table |
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| 1 | Sub-fields in Codec Type Fields |
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Sub-Field | Description |
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Sub-Field 1 | Network Type (one character): - C – Circuit Network
- P – Packet Network
| Sub-Field 2 | Codec Type (two numeric digits): - 0 – PKT_ENCODING_NULL
- 1 – PKT_ENCODING_G711
- 2 – PKT_ENCODING_G711_SILENCE_SUPPRESS
- 3 – PKT_ENCODING_G723
- 4 – PKT_ENCODING_G729A
- 5 – PKT_ENCODING_G729AB
- 6 – PKT_ENCODING_FAX_RELAY
- 7 – PKT_ENCODING_G723A
- 8 – PKT_ENCODING_G726
- 9 – PKT_ENCODING_ILBC
- 10 – PKT_ENCODING_ILBCSS
- 11 – PKT_ENCODING_G722
- 12 – PKT_ENCODING_G722_SILENCE_SUPPRESS
- 13 – PKT_ENCODING_G7221
- 14 – PKT_ENCODING_G7221_SILENCE_SUPPRESS
- 15 – PKT_ENCODING_G728
- 16 – PKT_ENCODING_G728_SILENCE_SUPPRESS
- 17 – PKT_ENCODING_AMR Bandwidth-efficient Mode
- 18 – PKT_ENCODING_AMR Octet-align Mode
- 19 – PKT_ENCODING_AMR/CRC
- 20 – PKT_ENCODING_AMR/CRC/Interleaving
- 21 – PKT_ENCODING_AMR/CRC/Robust-sorting
- 22 – PKT_ENCODING_AMR/CRC/Interleaving/Robust-sorting
- 23 – PKT_ENCODING_AMR/Interleaving
- 24 – PKT_ENCODING_AMR/Interleaving/Robust-sorting
- 25 – PKT_ENCODING_AMR/Robust-sorting
- 26 – PKT_ENCODING_AMRWB/BW Efficient
- 27 – PKT_ENCODING_AMRWB Octet-align Mode
- 28 – PKT_ENCODING_AMRWB/CRC
- 29 – PKT_ENCODING_AMRWB/CRC/Interleaving
- 30 – PKT_ENCODING_AMRWB/CRC/Robust-sorting
- 31 – PKT_ENCODING_AMRWB/CRC/Interleaving/Robust-sorting
- 32 – PKT_ENCODING_AMRWB/Interleaving
- 33 – PKT_ENCODING_AMRWB/Interleaving/Robust-sorting
- 34 – PKT_ENCODING_AMRWB/Robust-sorting
- 35 – PKT_ENCODING_EVRC Interleaved/Bundled format
- 36 – PKT_ENCODING_EVRC0 Header-free format
- 37 – PKT_ENCODING_EVRC1 Compact-bundled format, Half-rate in single rate mode
- 38 – PKT_ENCODING_EVRC1_FR_Compact-bundled format, Full-rate in single rate mode
- 39 – PKT_ENCODING_EVRCB Interleaved/Bundled format
- 40 – PKT_ENCODING_EVRCB0 Header-free format
- 41 – PKT_ENCODING_EVRCB1 Compact-bundled Format, Half-rate in single rate operation
- 42 – PKT_ENCODING_EVRCB1_FR Compact-bundled format, Full-Rate in single rate operation
- 43 – PKT_ENCODING_EFR
- 44 – PKT_ENCODING_REVERSE_OFFER_WILDCARD
- 45 – (not used)
- 46 – PKT_ENCODING_G726SS
| Sub-Field 3 | G711 Audio Encoding Types (these one digit values apply only when the Codec Type is G711 or G711_SILENCE_SUPPRESS): - 0 – CKT_ENCODING_NULL
- 1 – CKT_ENCODING_G711_ULAW
- 2 – CKT_ENCODING_G711_ALAW
G723 Audio Encoding Type (these one digit values apply only when the Codec Type is G723 or G723A): - 0 – G723_CODING_RATE_5P3_KBPS (5.3K bits per second)
- 1 – G723_CODING_RATE_6P3_KBPS (6.3K bits per second)
G726 Audio Encoding Type (this one digit value applies only when the Codec Type is G726 or G726SS): - 0 – G726_CODING_RATE_16KBPS
- 1 – G726_CODING_RATE_24KBPS
- 2 – G726_CODING_RATE_32KBPS
- 3 – G726_CODING_RATE_48KBPS
ILBC Audio Encoding Type (these one digit values apply only when the Codec Type is ILBC and ILBCSS): - 0 – ILBC_CODING_RATE_13P3_KBPS
- 1 – ILBC_CODING_RATE_15P2_KBPS
Sub-Field 3 is not applicable (treated as "don't care") for Code Types NULL, G729A, G729AB, and FAX_RELAY)
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Codec Type String Examples
| Caption |
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| 0 | Table |
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| 1 | Codec String Examples |
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| Codec String | Description |
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| P:4:1 | Ingress or egress leg is from a packet network with G.729A encoding. The Audio Encoding Type of "1" is meaningless for G.729A packet encoding. | | C:1:2 | Ingress or egress leg is from a circuit network with G.711 encoding and a Law audio encoding. | | P:1:2 | G.711 packet call with aLaw encoding. | | C:3:1 | G.723 circuit call a 6300 bits per second. |
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