Codec Compression Method & Codec Complexity supported by PVDM3

Source:
Understanding Codecs: Complexity, Hardware Support, MOS, and Negotiationhttp://www.cisco.com/c/en/us/support/docs/voice/h323/14069-codec-complexity.html

Codec Compression Method
PCM = Pulse Code Modulation
ADPCM = Adaptive Differential Pulse Code Modulation
LDCELP = Low-Delay Code Excited Linear Prediction
CS-ACELP = Conjugate-Structure Algebraic-Code-Excited Linear-Prediction
MP-MLQ = Multi-Pulse, Multi-Level Quantization
ACELP = Algebraic Code Excited Linear Prediction

Medium Complexity (4 calls / dsp)	High Complexity ( 2 calls / dsp)
G.711 (a-law and m -law)	G.728
G.726 (all versions)	G.723 (all versions)
G.729a, G.729ab (G.729a AnnexB)	G.729, G.729b (G.729-AnnexB)
Fax-relay	Fax-relay

Compression Method	Bit Rate (kbps)	MOS Score	Compression Delay (ms)
G.711 PCM	64	4.1	0.75
G.726 ADPCM	32	3.85	1
G.728 LD-CELP	16	3.61	3 to 5
G.729 CS-ACELP	8	3.92	10
G.729 x 2 Encodings	8	3.27	10
G.729 x 3 Encodings	8	2.68	10
G.729a CS-ACELP	8	3.7	10
G.723.1 MP-MLQ	6.3	3.9	30
G.723.1 ACELP	5.3	3.65	30

Source: http://www.cisco.com/c/en/us/products/collateral/interfaces-modules/voice-modules-interface-cards/qa_c67_553073.html

Table 3. Supported Codecs

High-Complexity Codecs	Medium-Complexity Codecs	Low-Complexity Codecs
G.723.1 (PVDM2 only), G.728, G.729, G.729B, Internet Low Bit Rate Codec (iLBC), and Modem Relay	G.729A, G.729AB, G.726, G.722, and Fax Relay	G.711 and clear-channel codec