Description

The Grandstream GRP2615 is a high-end, 10-line, carrier-grade desktop VoIP phone designed for enterprise or service-provider deployments. Its manufacturer describes it as being built for “mass deployment and easy management”. 
Key points:

• It supports 10 line keys and up to 16 SIP accounts in the GRP series. 

• It includes Gigabit Ethernet, integrated PoE, WiFi (dual-band) and Bluetooth which makes it flexible for different deployment scenarios (desk, hot-desk, mobile/desk hybrids).

• It is part of the “GRP Series of Professional/Carrier-Grade IP Phones” by Grandstream, which emphasises zero-touch provisioning, security (secure boot, dual firmware images, encrypted storage) and support for large scale roll-out (via their cloud platform “GDMS”). 

In short: if you need a reliable, feature-rich desktop VoIP phone for power-users (executive desk, supervisor, agent) with many line keys, multiple SIP registrations, good connectivity and management support — the GRP2615 is a strong candidate.

Key Features

Here are the standout features of the GRP2615:

• 10 physical line keys (and support for up to 16 SIP accounts) for handling multiple lines/users on one device. Up to 40 built-in digital BLF/speed-dial keys (MPKs) and support for extension modules (each module adds 40 keys) for large contact/extension monitoring. 

• HD audio in handset and speakerphone, with wide-band codec support for improved clarity. 

• Dual switched auto-sensing Gigabit Ethernet ports (10/100/1000 Mbps) with integrated PoE (so one cable powers the phone + passes through to PC) for clean installation. 

• Integrated WiFi (dual-band 2.4GHz/5GHz) and Bluetooth support, enabling wireless connectivity and accessories which adds flexibility. 

• Swappable faceplates for custom branding (useful for service providers) and adjustable stand / optional wall-mount.Enterprise-level security: secure boot, dual firmware images, encrypted configuration/data storage, TLS/SRTP support etc. API/management support: Supported by Grandstream Device Management System (GDMS) for provisioning & monitoring of many devices. 

• Noise Shield / background-noise reduction technology (in the GRP series) for clearer voice calls in busy environments. 

Specifications

Here is a more detailed specification list for the GRP2615:

Lines & Accounts

• Line keys: 10 physical line keys. 

• SIP Accounts: Up to 16 SIP accounts (some datasheets list “up to 16 SIP accounts”)

• MPKs/BLFs: 40 built-in digital BLF/speed-dial keys; extension modules (GBX20) add up to e.g. 4 modules so up to +160 keys. 

Display & Interface

• Screen: 4.3″ colour LCD, resolution 480×272 pixels. 

• Soft keys / function keys: 5 programmable context-sensitive soft keys; navigation keys; dedicated keys (Message, Transfer, Hold, Headset, Mute, Redial/Speaker etc.). 

Network & Ports

• Ethernet: Dual switched auto-sensing Gigabit ports (10/100/1000 Mbps) with integrated PoE. 

• WiFi: Integrated dual-band (2.4GHz & 5GHz) WiFi 802.11a/b/g/n/ac/ax (hardware version 5.0 & above) – depending region. 

• Bluetooth: Integrated Bluetooth (version depends on region, e.g., Bluetooth 5.0 in some listings). Headset port: RJ-9 headset jack (with EHS support for major brands) and USB port (depending region). 

Audio / Telephony Features

• Wideband audio: Codecs supported include G.722, Opus, G.711µ/a, G.726-32, G723, iLBC. 

• Telephony features: 3-way conference, hold, transfer, forward, call park/pickup, shared/bridged line appearance (SCA/BLA), XML/LDAP phonebook (up to ~2000 contacts), call log up to ~2000 records. 

• QoS: Layer 2 and Layer 3 QoS (802.1Q, 802.1P, DiffServ, MPLS) support. 

Security & Provisioning

• Protocols/Standards: SIP RFC3261, TCP/UDP, RTP/RTCP, HTTP/HTTPS, DHCP, PPPoE, STUN, LLDP, LDAP, TR-069, 802.1x, TLS, SRTP, IPv6. 

• Provisioning: HTTP/HTTPS/FTP/TFTP, mass provisioning via GDMS, support for encrypted XML config files. 

• Security measures: Secure boot, dual firmware images (redundant OS image), encrypted data/configuration storage, AES 256 etc.

Power & Environmental

• Power: Integrated PoE (802.3af) for network powering; also external power adapter optional in some regions. Example: Max power consumption about ~7.4 W (PoE) in one listing. 

• Operating temp: 0°C to 40°C; Storage: -10°C to 60°C; Humidity: 10% to 90% non-condensing. 

Physical / Packaging

• Weight: ~970 g (phone unit) per one listing. Dimensions: e.g., 243mm × 210mm × 82.3mm (L×W×H) for one variant. Mounting: Two-angle desk stand, wall-mountable (wall-mount kit optional). Swappable faceplates for branding/customization.