Fast dispatch and helpful advice before we placed a multi-site order. Pricing was clear and the product arrived ready for install.
Wesley G.
Grandstream GRP2603 Essential IP Phone
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£44.00
Excl. VAT
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SIP ACCOUNTS6
LINE KEYS3
DISPLAY2.7" LCD
ETHERNET2 × Gigabit
The Grandstream GRP2603 is the point in the essential range where the specification stops feeling entry-level. Three line keys carry up to six SIP accounts, the display grows to a 2.7-inch backlit LCD, and the network ports move up to full Gigabit — so the phone no longer throttles the PC plugged in behind it.
That makes it a sensible default for main office desks, particularly in businesses that have already moved to Gigabit cabling and do not want a 100 Mbps bottleneck at every workstation. Three call appearances give users room to hold one call, take another and still have a line free, while the familiar GRP management tooling keeps rollouts and firmware updates predictable. The GRP2603P variant adds integrated 802.3af PoE if you would rather not run mains adapters to every desk.
Ideal for
- Main office desks in small and medium businesses
- Sites with Gigabit cabling that cannot tolerate a 100 Mbps phone in the path
- Sales, support and account-management roles juggling several calls
- Practice and clinic reception desks
- Team leaders covering a personal DDI plus group numbers
- Hosted voice rollouts needing a solid mid-range handset
Key features
- Three lines with six SIP accounts — three simultaneous call appearances and plenty of registration headroom
- Dual-colour LED line keys — instant visual state for ringing, active and held calls
- 2.7-inch 132 × 64 backlit LCD — more room for caller detail and menu context than the GRP2601 and GRP2602
- Gigabit Ethernet on both ports — the desktop PC behind the phone keeps its full network speed
- 5-way audio conferencing — handle multi-party calls without the PBX bridge
- Four XML programmable soft keys — context-sensitive functions plus five navigation keys
- Wideband HD audio — G.722 and Opus alongside the usual narrowband codecs
- RJ9 headset jack with EHS — Plantronics, Jabra and Sennheiser hook switch support
- PoE option — the GRP2603P draws IEEE 802.3af Class 1 power from the switch
- Secure boot and encrypted storage — enterprise-grade protection for provisioned credentials
Technical specification
Telephony
- 3 lines, 6 SIP accounts, up to 3 call appearances
- 5-way audio conferencing
- Codecs: G.711µ/a-law, G.722 (wideband), G.723.1, G.726, G.729A/B, iLBC, Opus
Display and controls
- 132 × 64 pixel, 2.7-inch backlit graphical LCD
- 3 line keys with dual-colour LEDs
- 4 XML programmable context-sensitive soft keys
- 5 navigation and menu keys
Network
- Dual switched auto-negotiating 10/100/1000 Mbps Gigabit Ethernet ports
- Integrated PoE on the GRP2603P variant, IEEE 802.3af Class 1, 3.84W
Audio and headset
- HD handset and speakerphone
- RJ9 headset jack with EHS for Plantronics, Jabra and Sennheiser
Power and physical
- Universal power supply, +5VDC 600mA output
- Dimensions: 214 × 206 × 68 mm with handset
Security and management
- Secure boot, dual firmware images, encrypted data storage
- SRTP and TLS encryption
- GDMS and TR-069 mass provisioning
Datasheet
Download the official Grandstream GRP2603 datasheet (PDF)
Works with
| Brand | Grandstream |
|---|---|
| SKU | GRP2603 |
| Product type | IP PHONES |
| Availability | In stock |
- Grandstream GRP2604 — same lines and accounts plus 10 dedicated BLF keys
- PSU for GRP260x — mains adapter for the non-PoE model
- Grandstream GWN7801P PoE switch — power the GRP2603P from the network
- Replacement curly cord
- All Grandstream IP phones
- IP PBX solutions
- Grandstream UCM6302 IP PBX — a compact on-site UCM to register the GRP2603 to
Frequently asked questions
Does the GRP2603 have Gigabit Ethernet?
Yes. Both switched ports run at 10/100/1000 Mbps, so a PC connected through the phone is not limited to 100 Mbps as it would be on the GRP2601 or GRP2602.
How many calls can be active at once?
The phone provides three call appearances across its three line keys, with six SIP accounts available for registration.
Do I need the GRP2603P?
Only if you want the phone powered over the network cable. The GRP2603P is otherwise identical and draws IEEE 802.3af Class 1 power, which most PoE switches supply comfortably.
Is there a BLF version for monitoring colleagues?
Yes — the GRP2604 shares this specification and adds ten dedicated BLF keys, which suits reception and dispatch positions.
Will it register to a hosted platform?
Yes. It is a standard SIP handset and is commonly provisioned against hosted UK platforms as well as on-premise systems.
Need advice on lines versus BLF keys for your team? Call 0333 242 1314 or email sales@clisecure.com.
**Shipping and Fulfilment**
- **UK delivery:** Standard, express and timed services are shown at checkout where available.
- **Dispatch:** Stocked products are prepared for dispatch during normal business days.
- **Large or project orders:** Delivery timing is confirmed with the order or quotation.
- **VAT:** Product prices are displayed excluding VAT; VAT is calculated at checkout.
Grandstream GRP2603 Essential IP Phone
£44.00
Excl. VAT
· In stock for trade orders
Trade pricing availableNext-day UK dispatchAuthorised supplyProject quote supportSecure checkoutExpert pre-sales advice
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