User's Manual

FIRMWARE 1.0.3.4 GXW42XX USER MANUAL PAGE 14 OF 56
RTP/RTCP and AAL2 protocol), G.168 compliant Echo Cancellation, Dynamic Jitter
Buffer, Modem detection & auto-switch to G.711
Voice Compression
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
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
QoS
DiffServ, TOS, 802.1P/Q VLAN tagging
Transport Protocol
RTP/RTCP
DTMF Method
In-audio, RFC2833, and/or SIP Info
IP Signaling
SIP (RFC 3261)
Provisioning
TFTP, HTTP, HTTPS
Security
SRTP, IPSEC, TLS/SIPS, HTTPS, 802.1x
Management
Syslog support, HTTP and Telnet access
Dial Plan
Yes
3-Way Conference
3-Way conference with local mixing
Caller ID
Bellcore Type 1 & 2, ETSI, BT, NTT, FSK and DTMF-based CID
Polarity Reversal / Wink
Yes
Network Connectivity
IPv4, IPv6, TCP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP,
NTP, TFTP, TELNET, PPPoE, STUN
HARDWARE SPECIFICATION
The hardware specifications of the GXW4248 are detailed in Table 4.
TABLE 4: HARDWARE SPECIFICATION OF GXW4248 GATEWAY
GXW4248
Telephone Interface
2 RJ21 Ports only
FXS LEDs
48