Description
Need one DECT base that covers the floor, the desk, and the warehouse door? The Snom M250 is a single-cell SIP DECT base built for that job. It registers up to 10 Snom M5x devices, carries up to eight calls at once, and powers from a PoE switch or optional power adapter. Pair office handsets, a rugged warehouse phone, or the M58 DECT desk set on the same cell so walking staff and seated staff share one phonebook and one SIP platform.
The Telecom Spot Take
This base is the right size for a store, clinic, branch, or shop floor that needs cordless voice without a multi-cell project. Ten devices and eight concurrent calls match a typical retail or medical team. Pick the M53 or M55 for the office, the M56 for dirty or wet work, or the M58 when a desk still needs a large screen.
Key Features
- Single-cell DECT for up to 10 devices. One base covers M53, M55, M56 handsets and the M58 DECT desk phone. Facilities teams keep one wireless system instead of mixing cordless and wired islands.
- Eight simultaneous calls and 20 SIP identities. Enough talk paths for a busy register line or nurse station. Twenty accounts let you map extensions, hunt groups, or shared lines without buying a second base.
- HD audio codecs including G.722 and Opus. Wideband codecs keep speech clear when staff walk the floor or stand in a noisy stockroom.
- Power over Ethernet (IEEE 802.3af, Class 2). Hang the base near coverage, not near an outlet. A 10 W PSU (PN 00004570) is optional if the switch is not PoE.
- Two Ethernet ports (NET + PC), 10/100. Pass a PC or a second device through the base so you do not burn an extra wall jack.
- TLS 1.2 and SRTP. Signaling and media stay encrypted. Mutual authentication, failover, and server redundancy are built in for hosted or on-prem SIP.
- Zero-touch and remote management. SRAPS, HTTP/HTTPS/TFTP provisioning, DHCP options 66/159/160, TR-069, and TR-369 (USP) let IT push config and firmware without a truck roll.
- Over-the-air handset updates (SUOTA). Update registered M5x devices from the base instead of touching every charger.
- LDAP plus a 1,000-entry shared directory. Import CSV or XML. Staff see the same contacts on every handset. XML phonebooks are supported.
- Antibacterial housing, desktop placement. Specified for indoor use. Useful in clinics, hospitality, and shared work areas.
- Status at a glance. Green power LED plus two multicolor LEDs for VoIP and DECT link. Dedicated Link (pairing) and Reset keys sit on the base.
Technical Specifications
| Category | Specification |
|---|---|
| Model | Snom M250 single-cell DECT base |
| Related bundles | M253 (M250 + M53), PN 00004741; M256 (M250 + M56), PN 00004791 |
| Color | Black |
| Placement | Indoor, desktop |
| Housing | Anti-bacterial |
| Dimensions (H × W × D) | 189 × 123 × 70 mm |
| Weight | 280 g |
| Indicators | 3 LEDs: power (green); VoIP (green/red/orange); LINK (green/red/orange) |
| Keys | Link (DECT pairing); Reset |
| Handsets / devices | Up to 10 (M53, M55, M56, M58) |
| SIP identities / accounts | 20 |
| Simultaneous calls | Up to 8 |
| DECT standard | DECT |
| Frequency band (published) | Europe: 1,880–1,900 MHz |
| Coverage | Up to 50 m indoor; up to 300 m outdoor |
| Handset firmware | Software upgrade over the air (SUOTA) |
| Audio codecs | G.711 (A-law, μ-law), G.722, G.726, G.729AB, iLBC, Opus |
| Power | PoE IEEE 802.3af Class 2; optional 100–240 V AC adapter, 5 V DC / 2 A, 10 W |
| Network ports | 2 × RJ45 (NET, PC), Ethernet 10/100 Mbit/s |
| USB | USB 2.0 Type-A present, not in use |
| Network / QoS | VLAN (IEEE 802.1Q), OpenVPN, DHCP, LLDP-MED, NAT, ToS, DiffServ |
| VoIP protocols | SIP, RTP, STUN, SRTP |
| Security | TLS v1.2, HTTPS, IEEE 802.1X, AES-encrypted provisioning files, preinstalled certificate |
| Management | Web UI (password + HTTPS), SRAPS, TR-069, TR-369 (USP), PnP, custom default file |
| Provisioning | HTTP, HTTPS, TFTP; DHCP options 66, 159, 160 |
| Directory | LDAP; CSV/XML import/export; central directory up to 1,000 shared entries; XML phonebook |
| Call features | Speed dial (10); local dial plan; redial; CLIP; intercom; DND; deny list; call diversion; hold; mute; blind/attended transfer; handset-to-handset transfer; N-way network conference; 3-way local conference; 100-call history; call timer |
| Diagnostics | PCAP trace, syslog |
| Operating temperature | 0 °C to +35 °C |
| Humidity | < 95% non-condensing |
| Compatible devices | M53 (PN 00004740), M55 (PN 00004629), M56 (PN 00004656), M58 (PN 00004631) |
| Accessories | PoE injector A5E (PN 00004679); 10 W Power Adapter (PN 00004570) |
| Package Contents | M250 base, foot stand, ethernet cable |
Comparison at a Glance
Data below is from Snom’s M250 datasheet and the official M500-series overview.
| Snom M250 | Snom M500 (same series) | Snom M253 / M256 bundles | |
|---|---|---|---|
| Cell type | Single-cell | Dual-cell; up to 2 bases | M250 base plus one handset |
| Devices | Up to 10 M5x devices | Up to 10 / 8 handsets (single / dual cell) | Same 10-handset M5x family |
| Simultaneous calls | Up to 8 | Up to 8 (narrowband, series overview) | Same base capacity |
| Best when | One site, one cell, mix of desk and mobile staff | You may add a second cell later | You want a ready pair (M53 office or M56 rugged) |
| Extra on the bundle page | — | — | M253: up to 20 SIP accounts + SRAPS; M256: M56 alarm / man-down on the handset |
FAQ
How many phones can one M250 run?
Up to 10 Snom M5x devices and up to eight calls at the same time. The base also holds 20 SIP identities.
Which handsets work with it?
Snom M53, M55, and M56 handsets, plus the M58 DECT desk phone. Intercom, transfer between handsets, and some call features apply when those devices are paired.
Does it need a wall outlet?
Not if your switch supplies IEEE 802.3af Class 2 PoE. If it does not, Snom lists a 10 W adapter (PN 00004570) and an A5E PoE injector (PN 00004679).
What about coverage?
Snom rates the cell at up to 50 m indoors and up to 300 m outdoors. Walls, racking, and building materials will shrink that. Plan the desktop placement for line-of-sight to the work area.