Grandstream SIP gateway GXW-4501 - 1x E1/T1/J1, 30 concurren

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/J1 provider, businesses can drastically increase the number of PSTN/ISDN trunks integrated with their VoIP network. The GXW4500 series offers three models that provide 1, 2, or 4 T1/E1/J1 spans and support 30, 60, or 120 concurrent calls to cater to the VoIP needs of large and medium-sized enterprises.

The GXW4500 series supports PRI, SS7, and MFC R2 digital signaling protocols and nearly all major voice codecs including Opus, G.722, G.711, G.729, G.723, iLBC, G.726, GSM-FR, etc. This digital VoIP gateway series includes dual Gigabit network ports with a configurable integrated NAT router, two USB 3.0 ports, and one SD card interface. By adding echo cancellation, jitter buffer, T.38 fax support, TLS and SRTP security encryption, as well as automated provisioning by HTTP/TFTP with XML config files, the GXW4500 series is able to cater to the VoIP needs of large and medium enterprises.