What's the difference between GXP1620 and GXP1625?

Only PoE. The GXP1625 adds PoE class 2 support; the GXP1620 is wired-only with a DC adapter in the box. About $10 more. Almost always worth it.

Does it support Opus?

No. G.722 is the best codec it speaks. The modern GRP2603 (~$10 more) supports Opus and has a color screen + gigabit.

Limited. Two line keys, both usually used for SIP. For BLF, look at the GXP1628 (8 BLF keys, ~$10 more) or the modern GRP2603.

Is the GXP1625 still in production?

Yes. Grandstream continues to manufacture the GXP1625 with active firmware support.

Grandstream · GXP series · legacy entry plus · PoE

Grandstream GXP1625180×90 screen, PoE on board.

Two SIP accounts, a 180×90 backlit LCD, dual 10/100 ethernet with PoE class 2, four XML soft keys, full-duplex speakerphone. The GXP1625 is the GXP1620 with PoE — a $5 upgrade that almost always pays for itself.

Display

180×90 backlit LCD

SIP accounts

2 lines

Programmable keys

2 line + 4 soft keys

Ethernet

Dual 10/100 · PoE class 2

Audio

HD voice · full-duplex

Power

PoE preferred

$69 one-time

or rent for $7.99/mo — month-to-month, return anytime

Ships pre-configured · free next-business-day for orders $200+

Order a GXP1625 Rent for $7.99/mo Datasheet (PDF) ↓

✓ Auto-provisioned out of the box ✓ Warranty replacement included with rental ✓ Free shipping on orders $200+

Grandstream GXP1625 voip desk phone — front view with handset and display — Grandstream GXP1625

Why the GXP1625 is on the catalog.

The GXP1625 is the right pick when you want the GXP1620's bigger screen and the GXP1615's PoE on the same phone. Released a year after the original GXP1620, it added PoE class 2 (6.49 W max) to an otherwise-identical chassis. For about $10 over the wired GXP1620, you get to drop the power brick — almost always worth it.

Where it lives: low-traffic desks at small businesses, hotel front desks, reception in 5-10 person offices, kiosk phones in retail back-of-house. Anywhere you would buy a GXP1620 but you have PoE switches.

Modern equivalents: the GRP2603 is the next-generation phone at about $10 more, with gigabit ethernet, six BLF-capable keys, and a 2.48-inch color screen. For new deployments we strongly recommend the GRP2603; the GXP1625 is the right pick mainly for extending existing GXP1625 fleets or hitting a strict $70 price ceiling.

Full technical specifications.

Display & user interface
Display	180×90 backlit graphical LCD
Line keys	2 SIP line keys
Soft keys	4 XML soft keys
VoIP & SIP
SIP accounts	2 SIP accounts, 2 lines
Protocols	SIP RFC3261, NAT (STUN), TLS, SRTP, BLF
Codecs	G.722, G.711a/u, G.726, G.729A/B, iLBC
Provisioning	TR-069, XML, GDMS
Audio
HD voice	HD handset, HD speaker (G.722)
Headset	RJ9 wired
Connectivity
Ethernet	Dual 10/100 Mbps
PoE	IEEE 802.3af Class 2
Wi-Fi / Bluetooth	Not supported
Physical
Dimensions	208 × 173 × 75 mm
Weight	Approximately 0.75 kg
In the box (from voip.army)
Included	GXP1625 handset, base, curl cord, ethernet cable, stand, provisioning card
Not included	Power adapter (PoE preferred)

How it works on voip.army.

Plug the GXP1625 into PoE and ethernet. About a minute later it has registered to your extension. Same auto-provisioning flow as every other supported phone — no SIP credentials to type, no firmware to chase.

60s

Time from plug-in to first call

Boot, fetch config from our provisioning server, register, ready. About one minute on a normal connection.

SIP accounts on one phone

2 lines per phone. Each line key has a dual-color LED for status at a glance.

Programmable keys

2 line + 4 soft keys mapped from the voip.army portal — BLF, paging, parking, transfer destinations.

Per-device onboarding fees

Bringing your own? Send the MAC, factory-reset, plug in. No charge to add it to the fleet.

802.3af

PoE class

Standard PoE — any 802.3af-compliant switch from the last 15 years powers the phone without an adapter.

GDMS

Grandstream Device Management

Provisioning template tested against every Grandstream firmware release for GXP1625. We catch regressions before they reach your fleet.

Need GXP1625s for every desk?

Tell us how many you need and what extensions to map. We ship pre-configured next business day; you plug them in and they work.

Get a quote Start a free trial first

✓ Free shipping on orders $200+ ✓ 30-day hardware return ✓ Pre-configured before shipping

Grandstream GXP1625180×90 screen, PoE on board.

Why the GXP1625 is on the catalog.

Full technical specifications.

How it works on voip.army.

Time from plug-in to first call

SIP accounts on one phone

Programmable keys

Per-device onboarding fees

PoE class

Grandstream Device Management

Phones to compare it against.

Grandstream GXP1620

Grandstream GXP1628

Grandstream GRP2603

Need GXP1625s for every desk?