Reference

Networking > Wideband audio codecs support

Limitations and known issues

•Only the no patented codec G.722 is supported.

•Only Turret with XMA2 and Soft Turret (FlexPro, FlexPro + XMA2, FlexCom) support G722/L16.

•Bandwidth Calculation Formulas for Ethernet

Total packet size = Ethernet + (IP/UDP/RTP header) + (voice payload size)

PPS = (codec bit rate) / (voice payload size)

Bandwidth = total packet size * PPS

Example for L16:

Total packet size = 18 (Ethernet) + 40 (IP/UDP/RTP header) + 360 = 3344 bits

PPS = 128 000 / (360 *8) = 44 pps

Bandwidth = 3344*44 = 147.136 Kbps

•The following table contains the bandwidth calculation

Codec & Bit Rate (Kbps)	Voice Payload Size (Bytes)	Voice Payload Size (ms)	Bandwidth (Kbps)
G.711 (64 Kbps)	160 Bytes	20 ms	87.2 Kbps
iLBC (20 ms - 15.2 Kbps)	38 Bytes	20 ms	38.4 Kpbs
iLBC ( 30 ms - 13.33 Kbps)	50 Bytes	30 ms	28.8 Kpbs
G722 (64 Kbps)	160 Bytes	20 ms	87.2 Kbps
L16 PCM (128 Kbps)	360 Bytes	20 ms	147.136 Kbps