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Grandstream GRP2603 3-Line Essential IP Phone, 6 SIP Accounts, Dual Gigabit Ports

Part number GRP2603
  • 3 lines, 6 SIP accounts, up to 3 call appearances
  • Full-duplex speakerphone with HD audio to maximize audio quality and clarity
  • Noise shield technology and AI noise reduction to minimize background noise
  • Electronic Hook Switch (EHS) support for Plantronics, Jabra and Sennheiser headsets
  • Dual switched autosensing 10/100/1000 Mbps Gigabit Ethernet ports
  • Supports 5-way audio conferencing for easy conference calls
  • Enterprise-level protection including secure boot, dual firmware images and encrypted data storage
  • Swappable faceplate to allow for easy logo customization
IP Phone SIP Gigabit HD Voice Business Phone Grandstream
Price
⃁ 234.84 ⃁ 234.84 ⃁ 305.79 Save 23%
⃁ 234.84 ⃁ 305.79
(Tax excluded)
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  • Delivery within 4–10 business days across Saudi Arabia
  • Warranty according to the manufacturer
  • Tax invoice with every order
  • Technical support before and after purchase

Not sure this model fits your setup? Read the buying guide

Official datasheetGrandstream_GRP2603_Datasheet.pdf Download

Overview of Grandstream GRP2603

The Grandstream GRP2603 is a 3-line essential IP phone from the GRP carrier-grade series, designed with zero-touch provisioning for mass deployment and easy management. It supports 6 SIP accounts, a 2.7" backlit LCD, 5-way voice conferencing, full HD audio on speaker and handset, noise shield with AI noise reduction, EHS headset compatibility and dual Gigabit Ethernet ports. The phone is powered by the included universal power adapter. Enterprise-level security, a swappable faceplate and centralized cloud management through GDMS make it a reliable choice for busy offices, reception desks, clinics and schools.

Technical Specifications – Grandstream GRP2603

General

Protocols/StandardsSIP 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

Network InterfacesDual switched auto-negotiation 10/100/1000 Mbps Ethernet ports

Display & Keys

Graphic Display132 x 64 (2.7") backlit graphical LCD display
Feature KeysLine keys: 3 line keys with dual-color LED and support for 6 SIP accounts; Softkeys: 4 XML programmable context-sensitive keys; Navigation: 5 navigation/menu keys; 9 fixed keys: MESSAGE (with LED indicator), TRANSFER, HOLD, HEADSET, MUTE, SEND/REDIAL, SPEAKERPHONE, VOL+, VOL-

Audio

Auxiliary Port1 × RJ9 headset jack (EHS compatible: Plantronics, Jabra, Sennheiser and more)
Voice Codecs and CapabilitiesSupport 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
HD AudioYes, HD handset and speakerphone with support for wideband audio

Telephony

Telephony FeaturesHold, 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 failover

Physical

Base StandYes, 2 angle positions available (39° & 45°), wall mountable (wall-mount bracket sold separately)

Network

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

Security & Management

SecurityTLS 1.3 support; web access through HTTPS with user- and administrator-level passwords based on SHA-256 and SHA-256-sess; SIP support for TLS with mutual certificate validation (both sides); SIP authentication algorithms based on SHA-256, SHA-256-sess, SHA-512/256-sess and MD5-sess; media support for DTLS-SRTP and SDES-SRTP with crypto AEAD-AES-256-GCM, AES_256_CM_HMAC_SHA1_32, AES_256_CM_HMAC_SHA1_80, AES_CM_128_HMAC_SHA1_32 and AES_CM_128_HMAC_SHA1_80; 802.1X media access control
Multi-languageArabic, Catalan, Chinese (Simplified), Chinese (Traditional), Croatian, Czech, Dutch, English, French, German, Greek, Hebrew, Hungarian, Italian, Japanese, Korean, Latvian, Polish, Portuguese, Russian, Slovak, Slovenian, Spanish, Swedish, Turkish, Ukrainian
Upgrade/ProvisioningFirmware upgrade via FTP, TFTP, TFTPS, HTTP and HTTPS; mass provisioning using GDMS/TR-069 or AES encrypted XML configuration file
Device ManagementYes, GDMS

Power

Power AdapterUniversal power adapter: Input 100–240 V AC, 50–60 Hz; Output 5 V DC, 600 mA

Environment

Operating Temperature0 °C to 40 °C (32 °F to 104 °F)
Storage Temperature-10 °C to 60 °C (14 °F to 140 °F)
Humidity10%–90%, non-condensing

Physical

Package ContentGRP2603 phone, handset with cord, base stand, universal power supply, network cable, Quick Installation Guide
Dimensions214 mm × 206 mm × 68 mm (8.43" × 8.11" × 2.68") (L × W × H) (with handset)
Unit Weight780 g (1.72 lb)
Package Weight1,090 g (2.40 lb)

Compliance

FCCPart 15 Class B; FCC Part 68 HAC
CEEN 55032; EN 55035; EN 61000-3-2; EN 61000-3-3; EN 62368-1
RCMAS/NZS CISPR32; AS/NZS 62368.1; AS/CA S004
ICICES-003; CS-03

Source: Grandstream official website and datasheet. Specifications are subject to change by the manufacturer.

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PRACTICAL ANSWERS

IP phone questions

How do I choose an IP phone for an employee?

Start with the person’s daily call workflow, required keys, headset use and desk connectivity. Check the exact model against the PBX and provisioning method rather than selecting only by screen size or appearance.

Does an IP phone need a separate power adapter?

Check the phone’s supported power options, what is included in the package and the capabilities of the connected switch. Confirm that the complete proposed arrangement can power every phone, not just a single test device.

Will my headset work with the new phone?

Compare the headset and phone model numbers, connector type and any required adapter or call-control support. Ask to test answering, ending and muting a call with the intended combination before equipping a team.

Can a phone be used by a remote employee?

Confirm the PBX’s supported remote deployment method and the employee’s network requirements. Plan secure provisioning and support responsibilities; do not expose administration interfaces or assume a phone can be moved without configuration.

How should I compare phone models for a reception desk?

List the extensions the receptionist handles, the required transfer workflow and any need for expansion keys or a headset. Evaluate the full workflow with the PBX, including the features actually licensed and supported.

What should I check before deploying many IP phones?

Test a small representative group first, then review network ports, power, provisioning, user labels and the rollback plan. Keep an inventory linking each physical device to its intended user or location.

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