Grandstream Networks GXW-4004 User Manual page 15
Analog ip gateway gxw40 series 4, 8 or 24 fxs ports
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Also See for GXW-4004:
- User manual (36 pages) ,
- Setup manual (7 pages) ,
- Technical specifications (2 pages)
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SRTP)
Voice over Packet
Voice
Capabilities
(VAD) with CNG (comfort
noise generation) and PLC
(packet loss concealment),
AEC with NLP Packetized
Voice
(supports RTP and AAL2
protocol), G.168 compliant
Echo
Dynamic
Modem detection & auto-
switch to G.711
PSTN Fail-over
PSTN
power failure
G.711 + Annex I (PLC),
Annex
Voice Compression
format)
decoder,
G.726(ADPCM
16/24/32/40
G.729A/B/E, iLBC
G.726 provides proprietary
VAD,
power
Play Out unit (reordering,
fixed and adaptive jitter
buffer,
synchronization),
(automatic gain control),
Status
controlling via voice packet
header
DHCP Server/Client
Yes,
Switched Mode
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.19,
V.27ter, V.29 for T.38 fax
FIRMWARE VERSION 1.0.9.1
Activity
Detection
Voice
(VAD) with CNG (comfort
noise generation) and PLC
(packet loss concealment),
AEC with NLP Packetized
Protocol
Unit
Voice
(supports RTP and AAL2
protocol), G.168 compliant
Cancellation,
Echo Cancellation, Dynamic
Jitter
Buffer,
Jitter
detection & auto-switch to
G.711
failover
port
on
PSTN failover port on power
failure
G.711 + Annex I (PLC),
II
(VAD/CNG
Annex II (VAD/CNG format)
encoder
and
encoder
G.723.1A,
G.723.1A,
with
with 16/24/32/40 bit rates),
bit
rates),
G.729A/B/E, iLBC
G.726 provides proprietary
VAD, CNG, and signal power
CNG,
and
signal
estimation, Voice Play Out
estimation,
Voice
unit (reordering, fixed and
adaptive jitter buffer, clock
synchronization),
clock
(automatic gain control),
AGC
Status
controlling via voice packet
output,
Decoder
header
NAT
Router
or
Yes,
Switched Mode
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.19,
V.27ter, V.29 for T.38 fax
GXW40XX USER MANUAL
Activity
Detection
Voice
(VAD) with CNG (comfort
noise generation) and PLC
(packet loss concealment),
AEC with NLP Packetized
Protocol
Unit
Voice
(supports
compliant
Cancellation,
Buffer,
Modem
Jitter Buffer, Fax/Modem
detection & auto-switch to
G.711
N/A
G.711 + Annex I (PLC),
Annex
and
decoder,
format)
G.726(ADPCM
decoder,
G.726(ADPCM
16/24/32/40
G.729A/B/E, iLBC
G.726 provides proprietary
VAD,
power
Play Out unit (reordering,
AGC
fixed and adaptive jitter
buffer,
synchronization),
output,
Decoder
(automatic gain control),
Status
controlling via voice packet
header
NAT
Router
or
Yes, DHCP Client only
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.19,
V.27ter, V.29 for T.38 fax
Activity
Detection
Protocol
Unit
RTP)
G.168
Echo
Adaptive
II
(VAD/CNG
encoder
and
G.723.1,
with
bit
rates),
CNG,
and
signal
estimation,
Voice
clock
AGC
output,
Decoder
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