
FIRMWARE 1.0.3.4
GXW4248 USER MANUAL
PAGE 14 OF 54
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