New and Refurbished SIP Phones for Business
A SIP phone is a desk phone that uses SIP (Session Initiation Protocol), the open standard most hosted VoIP services and SIP phone systems use to set up calls. You enter the account details from your provider or phone system, and the phone registers over your network. This range covers new and refurbished SIP phones from Polycom, Yealink, Cisco, Snom, Fanvil, Grandstream, Siemens, Unify, Mitel, Aastra, Panasonic and HP.
It suits UK businesses moving to a hosted or 3CX phone system, and teams adding handsets to an existing SIP platform. For a general overview, see VoIP Phone. For new current models only, see IP Desk Phones.
Showing 1–12 of 328 resultsSorted by popularity
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Polycom VVX310
£45.00 £37.50 Ex. VAT -
Cisco SPA504G
£37.80 £31.50 Ex. VAT -
Grandstream GXP1450
£30.00 £25.00 Ex. VAT -
Yealink T22P
£30.00 £25.00 Ex. VAT -
Polycom VVX 300
£32.00 £26.67 Ex. VAT -
Polycom VVX 410
£43.20 £36.00 Ex. VAT -
Yealink T46S
£49.00 £40.83 Ex. VAT -
Polycom CX600
£30.00 £25.00 Ex. VAT -
Sale!
Mitel 5324
Original price was: £32.40.£30.00Current price is: £30.00. £25.00 Ex. VAT -
Yealink T48 S
£64.00 £53.33 Ex. VAT -
Polycom IP 321
£30.00 £25.00 Ex. VAT -
Snom 300
£45.00 £37.50 Ex. VAT
How to choose a SIP phone
Check your provider's list
Many hosted VoIP providers and 3CX only auto-provision phones on their own list. Check that list first, then choose a model from it. If you run 3CX, start with our 3CX supported phones.
Count accounts and line keys
A SIP phone can hold one or more SIP accounts. Entry models such as the Yealink T23G or Fanvil X3U suit general desks. The Yealink T46S, T48S and Polycom VVX 410 add more line keys and a larger colour screen.
Check ports and power
Most SIP phones take power from a PoE switch. Gigabit models, such as the Yealink T46S and T48S, keep full network speed for a PC plugged into the phone. Fast Ethernet models, such as the Yealink T41P, suit 100 Mb networks.
Reset provider-locked phones
Phones from a previous provider can carry locked settings or custom firmware. A factory reset clears most of them, and some need the old provider to release the device. Tell us your platform through a quote request and we can check first.
SIP versions of system phones
Some makers built SIP versions of their system phones, such as the Siemens OpenStage 40 SIP or a Cisco 7940 with SIP firmware. Check the exact version on the label. For phones that use a maker's own protocol, see IP Phone.
SIP phone families in this range
| Maker | Examples in this range |
|---|---|
| Yealink | T23G, T26P, T40G, T41P, T41S, T46S, T48S |
| Polycom | SoundPoint IP 550, VVX 201, VVX 410 |
| Cisco | SPA504G, SPA525G2, SPA921, SPA922, 7940 with SIP firmware |
| Snom | 300, D345 |
| Fanvil | X3U |
| Siemens | OpenStage 40 SIP, OpenStage 60 SIP |
Questions
What is a SIP phone?
A SIP phone is a desk phone that connects calls using SIP, the open standard behind most VoIP services. You add the SIP account details from your provider, and the phone registers over your office network. Many SIP phones can hold several accounts at once.
What is a SIP phone system?
A SIP phone system is a phone system that uses SIP to connect your handsets and outside lines. It can be hosted by a provider or run on your own server or cloud instance, as with 3CX. If you are choosing one, read about hosted telephone systems.
Can I use a SIP phone with my mobile?
A SIP desk phone does not connect to a mobile network. Many SIP providers offer a mobile softphone app on the same account, so calls can ring on your desk phone and your mobile. Ask your provider whether your plan includes it.
Are refurbished SIP phones a good option?
Yes, if your provider or 3CX still supports the model. Refurbished SIP phones suit offices that want a familiar model or need to match phones already on their desks. Some older models no longer receive firmware updates, so check your provider's list before you choose.
Do SIP phones work in the UK?
Yes, SIP is an international standard, so SIP phones work with UK hosted VoIP services and UK SIP trunks. Set the phone's tone or region setting to United Kingdom so dial and ring tones sound as UK callers expect.
Need a model that is not listed?
Send us the model numbers and quantities you need. We will reply with what we can supply.
Request a quote- Delivery: free next-day delivery to UK mainland addresses on in-stock items ordered by 3pm.
- Returns: within 14 days, see delivery information.
- Replacing old equipment? We buy used phones and systems and repair phones.
Buying refurbished phones and phone system hardware helps to reduce your impact on the environment, using less resources and reducing landfill. We can also recycle your old desk phones, back into the supply chain. Contact our team today and find out what help we can provide with your office telephones.