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Price: $66.67
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Last Updated: Nov 12, 2025
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Part of the GRP series of Carrier-Grade IP Phones, the GRP2603 is an essential 3-line model designed with zerotouch provisioning for mass deployment and easy management. It features a sleek design and a suite of nextgeneration features including: 5-way voice conferencing to maximize productivity, integrated PoE (GRP2603P), full HD audio on both the speaker and handset to allow users to communicate with the utmost clarity, EHS support for Plantronics, Jabra, and Sennheiser headsets and multi-language support. The GRP series includes carrier-grade security features to provide enterprise-level security, including secure boot, dual firmware images and encrypted data storage. For cloud provisioning and centralized management, the GRP2603 is supported by Grandstream's Device Management System (GDMS), which provides a centralized interface to configure, provision, manage and monitor deployments of Grandstream endpoints. Built for the needs of on-site or remote desktop workers and designed for easy deployment by enterprises, service providers and other highvolume markets, the GRP2603 offers an easy-to-use and easy-to-deploy voice endpoint.
Main Specification
| General Information | |
| Manufacturer | Grandstream Networks, Inc |
| Manufacturer Part Number | GRP2603 |
| Manufacturer Website Address | http://www.grandstream.com |
| Brand Name | Grandstream |
| Product Series | GRP |
| Product Model | GRP2603 |
| Product Name | 3-Line Essential IP Phone |
| Product Type | IP Phone |
| Technical Information | |
| Handset Connectivity Technology | Corded |
| Base Unit Connectivity Technology | Corded |
| IP Phone Technology | VoIP |
| Total Number of Phone Lines | 3 |
| Speakerphone | Yes |
| Interfaces/Ports | |
| Network (RJ-45) | Yes |
| Number of Network (RJ-45) Ports | 2 |
| Management & Protocols | |
| Communication Protocols | TLS |
| Communication Protocols | LLDP |
| Communication Protocols | DHCP |
| Communication Protocols | SIP |
| Communication Protocols | ARP |
| Communication Protocols | RTCP |
| Communication Protocols | SSH |
| Communication Protocols | IPv6 |
| Communication Protocols | SRTP |
| Communication Protocols | NTP |
| Communication Protocols | PPPoE |
| Communication Protocols | RTCP XR |
| Communication Protocols | TCP |
| Communication Protocols | ICMP |
| Communication Protocols | STUN |
| Communication Protocols | LDAP |
| Communication Protocols | UDP |
| Communication Protocols | RTP |
| Power Description | |
| Power Source | AC Adapter |
| Physical Characteristics | |
| Form Factor | Desktop |
| Form Factor | Wall Mountable |
| Height | 2.7" |
| Width | 8.1" |
| Depth | 8.4" |
| Weight (Approximate) | 1.72 lb |
| Miscellaneous | |
| Package Contents |
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WARNING:: The plastic used in cable products can expose you to lead and lead components,
chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information go to www.P65Warnings.ca.gov
