Grandstream GXW4502
Powerful Granstream PRI Gateway The Grandstream GXW4502 is an advanced gateway that provides 2 E1/T1/J1 spans and supports 60 concurrent calls to cater to the VoIP needs of large and medium-sized enterprises.The GXW4500 series are E1/T1 Digital VoIP Gateways that allow digital PSTN and ISDN trunks to be integrated with VoIP networks. By connecting the GXW4500 series with a VoIP network and a traditional PBX or E1/ T1 provider, businesses can drastically increase the amount of PSTN/ISDN trunks integrated with their VoIP network.Features:2 RJ45 ports, supporting up to 30 simultaneous VoIPDual self-adaptive Gigabit ports (switched or routed)(2) USB 3.0, (1) SD card interfaceLAN, WAN, E1/T1/J1128x32 dot-matrix graphic LCD with DOWN and OK buttonsReset switchVoice over Packet capabilities: LEC with NLP Packetized Voice Protocol Unit, 128ms-tail-length carrier grade Line Echo Cancellation, Dynamic Jitter Buffer, Modem detection & auto-switch to G.711Voice and Packet codecs: G.711 A-law/U-law, G.722, G.723.1 5.3K/6.3K, G.726, G.729A/B, iLBC, AAL2-G.726-32Fax over IP: T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711 for Fax Pass-through, Fax data pump V.17, V.21, V.27ter, V.29 for T.38 fax relayVoice Quality Enhancement: Echo cancellation (G.168-2004), Jitter buffer, Silence suppression (VAD, CNG), PLCQOS: Layer 2 QoS (802.1Q, 802.1p) and Layer 3 (ToS, DiffServ, MPLS) QoSDMTF Methods: In-band audio, RFC2833, and SIP INFODigital Signalling: SIP (RFC 3261) over UDP/TCP/TLS, PRI, SS7, MFC R2, RBS (pending) | PRI switch types: Euro ISDN, nation, Q.SIG | CAS: MFC R2 (Argentina, Brazil, China, Czech Republic, Colombia, Ecuador, Indonesia, ITU, Mexico, Philippines, Venezuela) | SS7: ITU, ANSI, ChinaSecurity: Media Encryption SRTP, TLS, HTTPS, SSH, 802.1XUser-defined ports: SIP port, RTP port, HTTP/HTTPS portAdvanced Defense: Fail2ban, alert events, Whitelist, Blacklist, strong password-based access control
Ref: GRAGXW4502UK