Protocols/Standards
SIP RFC3261, TCP/IP/UDP, RTP/RTCP, RTCP-XR, HTTP/HTTPS, ARP, ICMP, DNS (A record,
SRV, NAPTR), DHCP, PPPoE, SSH, TFTP, NTP, STUN, SIMPLE, LLDP-MED, LDAP, TR-069,
SNMP, 802.1X, TLS, SRTP, IPv6

Network Interfaces

Dual switched auto-negotiation 10/100/1000 Mbps Ethernet ports, integrated PoE
(GRP2603P only)

Graphic Display

132 x 64 (2.7'') backlit graphical LCD display

Feature Keys

3 line keys with dual-color LED and support for 6 SIP accounts, 4 XML programmable
context sensitive soft keys, 5 (navigation, menu) keys. 9 dedicated function keys for:
MESSAGE (with LED indicator), TRANSFER, HOLD, HEADSET, MUTE, SEND/REDIAL,
SPEAKERPHONE, VOL+, VOL-

Auxiliary Port

RJ9 headset jack (allowing EHS with Plantronics & Jabra & Sennheiser headsets)

Voice Codecs and Capabilities

Support for G.729A/B, G.711µ/a-law, G.726, G.722 (wide-band), G.723.1, iLBC, Opus,
in-band and out-of-band DTMF (in audio, RFC2833, SIP INFO), VAD, AEC, CNG, PLC,
AGC, AJB

Telephony Features

Hold, transfer, forward, 5-way conference, call park, call pickup,
shared-call-appearance (SCA)/bridged-line-appearance (BLA), downloadable phonebook
(XML, LDAP, up to 2000 items), call waiting, call log (up to 800 records), off-hook
auto dial, auto answer, click-to-dial, flexible dial plan, hot-desking, personalized
music ringtones and music on hold, server redundancy and fail-over

HD Audio

Yes, HD handset and speakerphone with support for wideband audio

Base Stand

Yes, 2 angle positions available (39° & 45°), Wall Mountable
(*wall mount sold separately)

QoS

Layer 2 QoS (802.1Q, 802.1P) and Layer 3 (ToS, DiffServ, MPLS) QoS

Security

Ordinary user and administrator level passwords based on SHA-256 and SHA-256
sess authentication, SIP authentication algorithms based on SHA-256, SHA-256 sess,
SHA-512/256, SHA-512/256 sess, MD5 sess. AES security profile, SRTP, TLS call
encryption, 802.1X media access control.

Multi-language

English, Chinese, Korean, Japanese, German, Italian, French, Spanish, Portuguese,
Russian, Croatian, and more

Upgrade/Provisioning

Firmware upgrade via FTP/TFTP / HTTP / HTTPS, mass provisioning using GDMS/TR-069
or AES encrypted XML configuration file

Power & Green Energy Efficiency

Universal Power Supply Input 100-240VAC 50-60Hz; Output +5VDC, 600mA; PoE:
IEEE802.3af Class 1, 3.84W; IEEE802.3az (EEE) (GRP2603P Only)

Temperature and Humidity

Operation: 0°C to 40°C

Storage: -10°C to 60°C

Humidity: 10% to 90% Non-condensing

Package Content

GRP2603 phone, handset with cord, base stand, universal power supply
(GRP2603 only), network cable, Quick Installation Guide

Physical

Dimension: 214mm (L) x 206mm (W) x 68mm (H) (with handset)

Unit weight: 780g; Package weight: 1090g for GRP2603P & 1140g for GRP2603

GRP2603 / GRP2603P Compliance

FCC: Part 15 Class B; FCC Part 68 HAC;

CE: EN 55032; EN 55035; EN 61000-3-2; EN 61000-3-3; EN 62368-1;

RCM: AS/NZS CISPR32; AS/NZS 62368.1; AS/CA S004;

IC: ICES-003; CS-03;