providing the highest level of communication services

Better voip experience with:
Eutectics
IPP201 and IPP200T Handset

Voice engine

DRC has a lot of voice codecs, both narrowband and wideband and,depending on the codec, with different sampling rates from 8KHz to 48KHz.
Voice engine support adaptive jitter buffer, PLC (packet loss concealment), VAD (voice activity detection), DTX (discontinuous transmission), CNG (comfort noise generation).

The basic set of codecs (available for commercial and free versions) includes:
G711 u-Law
G711 a-Law
iLBC
GSM
L16
Speex
G722
G722.1
G726

The advanced set of codecs (available with commercial versions) also provides more codecs
G.729 annex A, B, D and E (need additional customer's license)
G.729.1(need additional customer's license)
G.728 (need additional customer's license)
AMR (need additional customer's license)

Note: Many codecs require a specific license that is not included. If not for testing purposes, then, you can use some additional codecs only if you have the specific license of the licensee.