Grandstream UCM6300A, IP PBX appliance, Dual GigE RJ45 Ethernet ports with PoE Plus

Reset button Yes, long press to reset to factory settings and short press to reboot VoP LEC capabilities with NLP Packetized Voice Protocol, 128ms-tail-length Operator-class echo cancellation, Dynamic jitter buffer, modem detection and automatic switching to G.711, NetEQ, FEC 2.0, jitter resistance (up to 50% loss of audio packets) Voice and fax. codecs Opus, G.711 A-law/U-law, G.722, G722.1 G722.1C, G.723.1 5.3K/6.3K, G.726-32, G.729A/B, iLBC, GSM; T.38 Video codecs H.264, H.263, H263+, H.265, VP8 QoS Layer 2 QoS (802.1Q, 802.1p) and Layer 3 (ToS, DiffServ, MPLS) QoS API API for integrating third-party platforms and applications Operating system Based on Asterisk 16 version DTMF method In-band audio, RFC4733 and SIP INFO Automatic Configuration protocol and Plug-and-Play Mass configuration using an XML configuration file with AES encryption, automatic detection and configuration of subscriber IP devices from Grandstream using ZeroConfig (DHCP Option 66 multicast SIP SUBSCRIBE mDNS), a list of events between the local and remote backbone Network protocols TCP/UDP/IP, RTP/RTCP, ICMP, ARP, DNS, DDNS, DHCP, NTP, TFTP, SSH, HTTP/HTTPS, PPPoE, STUN, SRTP, TLS, LDAP, HDLC, HDLC-ETH, PPP, Frame Relay (under development), IPv6, Rebound methods Busy/Overload/Howl Tone, Reverse polarity, Short-term shutdown, Circuit current shutdown Data encryption TLS, HTTPS, SSH, 802.1X