User's Manual
GXP1510/GXP1525/10 Technical Specifications 
Protocols/Standards 
SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, 
ICMP, DNS (A record, SRV, NAPTR), DHCP, PPPoE, SSH, TFTP, NTP, 
STUN, SIMPLE, LLDP-MED, LDAP, TR-069, 802.1x, TLS, SRTP 
Network Interfaces 
Dual switched auto-sensing 10/ 100 Mbps Ethernet ports, integrated PoE 
(GXP1525 only) 
Graphic Display 
132*48 backlit LCD display 
Feature Keys 
2 line keys with dual-color LED and 2 SIP accounts. 3 XML programmable 
context sensitive soft keys. 5 (navigation, menu) keys. 13 dedicated 
function keys for PAGE/INTERCOM, PHONEBOOK, MESSAGE, CALL  
ENCRYPT, HOLD, RECORD, MUTE, HEADSET, TRANSFER, 
ONFERENCE, SEND and REDIAL, SPEAKERPHONE, VOLUME 
Voice Codecs 
Support for G.711µ/a, G.722 (wide-band), G.722.1, G.726-32, G.729 
A/B(pending), iLBC, Opus (pending) , in-band and out-of-band DTMF (In 
audio, RFC2833, SIP INFO) 
Telephony Features 
Hold, transfer, forward (unconditional/no-answer/busy), call park/pickup, 
3-way conference, shared-call-appearance (SCA) / bridged-line-
appearance (BLA), downloadable phone book (XML, LDAP, up to 1000 
items), call waiting, call history (up to 200 records), off-hook auto dial, 
auto answer, click-to-dial, flexible dial plan, hot desking, personalized 
music ringtones, server redundancy & fail-over 
HD Audio 
Yes, both on handset and speakerphone 
Headset Jack 
RJ9 headset jack (allowing EHS with Plantronics headsets) 
Base Stand 
Yes, allow 2 angle positions 
Wall Mountable 
Yes 
QoS 
Layer 2 QoS (802.1Q, 802.1P) and Layer 3 (ToS, DiffServ, MPLS) QoS 
Security 
User and administrator level access control, MD5 and MD5-sess based 
authentication, 256-bit AES encrypted configuration file, TLS, SRTP, 
HTTPS, 802.1x media access control 
Multi-language 
English, German, Italian, French, Spanish, Portuguese, Russian, 
Croatian, simplified and traditional Chinese, Korean, Japanese, and more 
Upgrade/Provisioning 
Firmware upgrade via TFTP / HTTP / HTTPS or local HTTP upload, mass 
provisioning using TR-069 or AES encrypted XML configuration file 
Power & Green Energy 
Efficiency 
Universal Power Supply Input 100-240VAC 50-60Hz; Output +5VDC, 600mA 
PoE+ (802.3af) Max Input voltage: 57V;Class 1, 0.44-3.84W 
Physical 
Dimension:209(L)*184.5(W)*76.2(H) (with handset) 
Unit Weight:723.7g  Package Weight:1056.6g 
Temperature and 
Humidity 
Operation: 0°C to 40°C 
Storage: -10°C to 60°C  
Humidity: 10% to 90% Non-condensing 
Package Content 
GXP1520/1525 phone, handset with cord, base stand, universal power 
supply, network cable, Quick Start Guide, brochure, GPL license 
Compliance 
FCC: Part 15 (CFR 47) Class B 
CE : EN55022 Class B, EN55024, EN61000-3-2, EN61000-3-3, 
EN60950-1 
RCM: AS/ACIF S004; AS/NZS CISPR22/24; AS/NZS 60950 



