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Grandstream phones, ATAs & paging

Grandstream delivers the most product categories of any VoIP manufacturer — desk phones, ATAs, channel bank gateways, IP paging speakers, and door intercoms. The budget-conscious choice for offices that need reliable VoIP hardware without premium pricing. Callifi supplies and configures the full Grandstream lineup.

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GRP Series (Current Desk Phones)

Professional desk phones at budget prices

The GRP series replaced the older GXP line with better displays, Gigabit standard, and improved audio. Solid everyday office phones at Grandstream's signature low prices.

Top model

GRP2670

7" color touch · 12 SIP lines · Gigabit · Bluetooth · Wi-Fi · USB. Grandstream's flagship. Impressive for the price.

GRP2636

4.3" color display · 6 SIP lines · Gigabit · Bluetooth · Wi-Fi. Mid-range with wireless connectivity built in.

Best value

GRP2614

2.8" color + 2.4" secondary display · 4 SIP lines · Gigabit. Dual-screen design with 8 programmable keys.

GRP2613

2.8" color display · 6 SIP lines · Gigabit. 3 line keys with 3 pages = 9 programmable keys.

GRP2612

2.4" color display · 4 SIP lines · Gigabit. Affordable everyday office phone with HD audio.

GRP2601

2.2" display · 2 SIP lines · 10/100. Entry-level for common areas and light use. Cheapest color-display SIP phone available.

GXP Series (Previous Gen — Still Available)

The budget classic — we still supply & support

GXP2170

4.3" color display · 6 SIP lines · Gigabit · Bluetooth · 48 programmable keys. The GXP flagship — still a great phone.

GXP2135

2.8" color display · 8 SIP lines · Gigabit · Bluetooth · 32 programmable keys.

GXP1630

3.3" LCD · 3 SIP lines · Gigabit. Budget GXP for small offices and common areas.

GXP1620

3.3" LCD · 2 SIP lines · 10/100. One of the cheapest SIP phones ever made. Still works great.

ATAs & Gateways

Connect analog devices to your VoIP system

ATAs (Analog Telephone Adapters) let you plug analog phones, fax machines, credit card terminals, and alarm systems into your VoIP network. Gateways handle high-density analog connections for larger deployments.

HT812

2-port FXS ATA · Gigabit · NAT router. Connect 2 analog phones or fax machines to VoIP. Our #1 selling ATA.

HT814

4-port FXS ATA · Gigabit · NAT router. Same as HT812 with 4 analog ports for larger offices.

HT801

1-port FXS ATA · 10/100. Single analog device to VoIP. Simplest option for one fax or alarm.

HT802

2-port FXS ATA · 10/100. Budget 2-port ATA without Gigabit.

Channel bank

GXW4232

32-port FXS gateway. High-density analog gateway for connecting up to 32 analog phones/devices to VoIP. For hotels, warehouses, and large analog deployments.

GXW4224

24-port FXS gateway. Mid-density analog gateway. Connect 24 analog devices to VoIP.

GXW4216

16-port FXS gateway. Connect 16 analog devices. Good for medium offices with existing analog phones.

GXW4248 v2

48-port FXS gateway · Gigabit. The high-density workhorse for large analog deployments — hotels, hospitals, warehouses.

IP Paging Speakers & Intercoms

Overhead paging, intercoms & announcement speakers

SIP-based paging speakers that integrate directly with your VoIP phone system. Page from any phone, schedule announcements, and set up zone-based paging — no separate PA system needed. The same family covers door entry, so one platform handles paging and access.

Outdoor

GSC3518HS

50W horn speaker · Up to 126 dBA · 3 mics with AI noise reduction · Text-to-speech · IP66 with stainless steel bracket · PoE++ in, PoE+ out. Loading docks, yards, parking areas and factory floors.

Talk-back speaker

GSC3516

In-ceiling speaker · 2-way voice · 3 directional mics with beamforming plus omnidirectional aux mic · SIP & multicast · Wi-Fi & Bluetooth. Premium intercom/paging speaker with talk-back capability.

GSC3510

Wall/ceiling speaker · 2-way voice · 3 directional mics with beamforming · SIP & multicast · Wi-Fi & Bluetooth. Versatile intercom speaker for any location.

GSC3506 v2

30W speaker with HD acoustic chamber · SIP & multicast paging with priority override · Line-out, switch-in and alarm-in ports · PoE++. One-way paging speaker — no microphone.

GSC3506

Speaker with HD acoustic chamber · SIP & multicast paging with priority override · Switch-in and alarm-in ports · PoE/PoE+. Previous generation — still supplied for matching existing deployments.

GSC3505

Wall speaker · SIP & multicast · Wi-Fi & Bluetooth · PoE/PoE+. One-way paging for hallways, lobbies, and common areas.

Door entry

GSC3560 / GSC3565

Door intercoms · Dual mics with 10W speaker · Built-in solid state relay · Door release by app, SIP call or HTTP API · QR code entry on the GSC3565 · AI noise suppression on the GSC3560 · IP66 and IK10 rated.

For system design — zones, scheduled bells, emergency announcements, and bridging an existing analog PA — see overhead paging systems.

FAQ

Grandstream questions

Why choose Grandstream?

Price. Grandstream consistently offers the lowest prices for reliable VoIP hardware. Their GRP desk phones cost 30-50% less than comparable Yealink or Poly models. They're also the go-to for ATAs, gateways, and paging speakers — product categories where other brands charge significantly more. For budget-conscious deployments, Grandstream is hard to beat.

What's an ATA and when do I need one?

An ATA (Analog Telephone Adapter) converts analog signals to VoIP. You need one if you want to connect an analog device — fax machine, credit card terminal, overhead pager, alarm system, postage meter, or elevator phone — to your VoIP phone system. The HT812 is our most popular ATA: plug your analog device into the ATA, plug the ATA into your network, done.

What's a channel bank / FXS gateway?

A channel bank (FXS gateway) is a high-density ATA. Instead of connecting 2 or 4 analog devices, it connects 16, 24, 32, or 48. Hotels use them to connect room phones, warehouses use them for wall phones and paging, and businesses transitioning from analog PBX systems use them to keep existing analog phones while switching to VoIP behind the scenes. The GXW4232 (32-port) is our most commonly deployed gateway.

Can Grandstream paging speakers replace my overhead PA system?

In many cases yes. Grandstream GSC speakers connect directly to your VoIP phone system — page from any phone, set up zone-based paging, and schedule automated announcements. For offices transitioning from analog PA, you can also use a Grandstream HT ATA or a snom PA1 to bridge your existing analog speakers to VoIP. We'll assess your setup and recommend the best approach — see overhead paging systems for the full picture.

Which GSC speaker do I need?

If people need to answer back — a warehouse floor, a loading bay, a stockroom — you want a talk-back speaker with microphones: the GSC3516 for ceilings or the GSC3510 for walls. If it's announcements only, the GSC3506 v2 covers most indoor spaces. Outdoors or anywhere with machinery noise, the GSC3518HS horn is the one that carries. Tell us the building and we'll spec the mix.

Can I unlock doors from my phone system?

Yes. The GSC3560 and GSC3565 door intercoms register to your phone system like any other device — a visitor presses the button, your desk phones and mobile apps ring, and staff release the door from the phone, an app, or an HTTP API call. The GSC3565 also supports QR code entry. Both are IP66 and IK10 rated for outdoor entrances.

Other brands we carry

Cisco Poly Yealink snom Konftel All phones →

Need Grandstream hardware for your office?

Phones, ATAs, gateways, paging speakers — tell us what you need and we'll configure everything.

Get a Quote

Or call (212) 423-1234 · get@callifi.com

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