Grandstream Networks GXP21 Series User Manual page 4

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Specifications
The following table resumes all the technical specifications including the protocols / standards
supported, voice codecs, telephony features, languages and upgrade/provisioning settings for the
GXP21xx series.
Protocols/Standards
Network Interfaces
Graphic Display
Bluetooth
Feature Keys
Voice Codec
Auxiliary Ports
Page 4
SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS,
FTP/FTPS, ARP, ICMP, DNS (A record, SRV, NAPTR), DHCP,
PPPoE, SSH, TFTP, NTP, STUN, SIMPLE, LLDP, LDAP, TR-
069, 802.1x, TLS, SRTP, IPv6
Dual switched auto-sensing 10/100/1000 Mbps Gigabit
Ethernet ports with integrated PoE
2.8 inch (320×240) TFT color LCD
Yes, Bluetooth V2.1 (GXP2130v2 only, GXP2130v1 does not
support Bluetooth)
3 line keys with up to 3 SIP accounts, 8 speed-dial/BLF
extension keys with dual-color LED, 4 programmable contexts
sensitive softkeys, 5 navigation/menu keys, 11 dedicated
function keys for: MESSAGE (with LED indicator),
PHONEBOOK, TRANSFER, CONFERENCE, HOLD,
HEADSET, MUTE, SEND/REDIAL, SPEAKERPHONE,
VOLUME+, VOLUME –
Support for G.729A/B, G.711µ/a-law, G.726, G.722 (wide-
band), and in-band and out-of-band DTMF (in audio, RFC2833,
SIP INFO)
RJ9 headset jack (allowing EHS with Plantronics headsets)
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