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FIRMWARE 1.0.0.49 GXW42XX USER MANUAL PAGE 14 OF 54
Voice over Packet
Capabilities
(
Cancellation, Dynamic Jitter
Buffer,
auto-switch to G.711
Voice Activity Detection
(VAD) with CNG (comfort
n
oise generation) and PLC
(packet loss concealment),
LEC with NLP Packetized
Voice Protocol Unit
(supports RTP/RTCP and
AAL2 protocol), G.168
compliant Echo
Cancellation, Dynamic Jitter
Buffer,
Modem detection &
auto-switch to G.711
Voice Activity Detection
(VAD) with CNG (comfort
noise generation) and PLC
(packet loss concealment),
LEC with NLP Packetized
Voice Protocol Unit
(supports RTP/RTCP and
AAL2 protocol), G.168
compliant Echo
Cancellation,
Dynamic Jitter
Buffer,
Modem detection &
auto-switch to G.711
Voice Compression
G.729, iLBC,
Voice Play Out unit
(automatic gain control),
header
G.711 + Annex I (PLC),
Annex II (VAD/CNG format)
encoder and decoder, G.722
(pending), G.723.1A,
G.726(ADPCM with
16/24/32/40 bit rates),
G.729, iLBC,
G.726 provides
proprietary VAD, CNG, and
signal power estimation,
Voice Play Out unit
(reordering, fixed and
adaptive jitter buffer, clock
synchronization), AGC
(automatic gain control),
Status outpu
t, Decoder
controlling via voice packet
header
G.711 + Annex I (PLC),
Annex II (VAD/CNG format)
encoder and decoder, G.722
(pending), G.723.1A,
G.726(ADPCM with
16/24/32/40 bit rates),
G.729, iLBC,
G.726 provides
proprietary VAD, CNG, and
signal power estimation,
Voice Play Out unit
(reordering, fixed and
adaptive jitter buffer, clock
synchronization), AGC
(automatic gain control),
Status output, Decoder
controlling via voice packet
header
DHCP Server/Client
DHCP Client only DHCP Client only DHCP Client only
Fax over IP
T.38 compliant Group 3 Fax
Relay up to 14.4kpbs and
auto-
switch to G.711 for Fax
Pass-through,
Fax Datapump V.17, V.21,
V.27ter, V.29 for T.38 fax
relay
T.38 compliant Group 3 Fax
Relay up to 14.4kpbs and
auto-
switch to G.711 for Fax
Pass-through,
Fax Datapump V.17, V.21,
V.27ter, V.29 for T.38 fax
relay
T.38 compliant Group 3 Fax
Relay up to 14.4kpbs and
auto-
switch to G.711 for Fax
Pass-through,
Fax Datapump V.17, V.21,
V.27ter, V.29 for T.38 fax
relay
QoS
DiffServ, TOS, 802.1P/Q
VLAN tagging
DiffServ, TOS, 802.1P/Q
VLAN tagging
DiffServ, TOS, 802.1P/Q
VLAN tagging
Transport Protocol
RTP/RTCP RTP/RTCP RTP/RTCP
14


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