IP Phone User Manual
Grandstream Networks, Inc.  GXP1400/1405 User Manual   Page 6 of 36 
   Firmware version: 1.0.1.83  Last Updated: 08/2011 
Universal Switching 
Input: 100-240VAC 50-60 Hz 
Power Adaptor 
Output: +5VDC, 800mA, 4.0 W, UL certified 
Dimension 
186mm (W) x 210mm (L) x 81mm (D) 
Weight 
Unit weight: 0.7KG 
Package weight: 1.1KG (GXP1400), 1.0KG (GXP1405) 
Temperature 
32 -104
° 
F/ 0 - 40
°
C 
Humidity 
10% - 90% (non-condensing) 
Compliance 
FCC Part 15 (CFR 47) Class B 
EN55022 Class B, EN55024, EN61000-3-2, EN61000-3-3, EN 60950-1  
AS/NZS CISPR 22 Class B, AS/NZS CISPR 24, RoHS 
UL 60950 (power adapter) 
Table 6: GXP1400/1405 Technical Specifications 
Lines  
2 lines with 1 SIP account, 3 XML programmable soft-keys 
Protocol Support 
Support SIP 2.0, TCP/UDP/IP, PPPoE, RTP, SRTP by SDES, HTTP, 
ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, SIMPLE/PRESENCE 
protocols, TR-069, 802.1x 
Support multiple SIP accounts and up to 11 media channels concurrently 
Support SIP PUBLISH method (RFC 3903), SIP Presence package 
(RFC 3856, 3863) for use of MFKs, SIP Dialog package (RFC 4235) 
Support for SIP MESSAGE method (RFC 3428) 
Display  
Graphic LCD display, up to 4 level grayscale 
Feature Keys  
HOLD, TRANSFER, CONF, LINE 1, LINE 2, MSG, SPEAKERPHONE, 
HANDSET, HEADSET, MUTE/DND, NAVIGATION(5), VOLUME, 3 XML 
Programmable Soft keys 
Device Management  
NAT-friendly remote software upgrade (via TFTP/HTTP) for deployed 
devices including behind firewall/NAT 
Auto/manual provisioning system, Web GUI Interface 
Support Layer 2  (802.1Q, VLAN, 802.1p)  and Layer 3 QoS (ToS, 
DiffServ, MPLS) 
Audio Features  
Full-duplex hands-free speakerphone 
Advanced Digital Signal Processing (DSP) 
Dynamic negotiation of codec and voice payload length 
Support for G.723,1 (5.3/6.3K), G.729A/B, G.711 a/µ-law, G.726-32, 
G.722 (wide-band), and iLBC codecs 
In-band and out-of-band DTMF (in audio, RFC2833, SIP INFO) 
Silence Suppression, VAD (voice activity detection), CNG (comfort noise 
generation), ANG (automatic gain control) 
Acoustic Echo Cancellation (AEC) with Acoustic Gain Control (AGC) for 
speakerphone mode, support side tone 
Adaptive jitter buffer control (patent-pending) and packet delay and loss 
concealment 
HD audio handset with HD wideband audio codecs for excellent double-
talk performance 
Telephony Features 
Intuitive graphic user interface  (GUI), downloadable phone book (XML, 
LDAP),  support for anonymous call using privacy header,  MLS (multi 










