OpenScape Business X3R — 2U Rack UC Platform
Compact 2U rack UC platform for mid-size offices — a hybrid telephony system scaling up to 500 users, with IP, digital, analog and DECT endpoints on a single platform.

From the same family
Specifications
- Form factor
- 2U rack
- Dimensions (H × W × D)
- 89 × 440 × 380 mm
- Weight
- ≈ 6 kg
- Color
- Gray / Green
- Mainboard
- V3 Advanced
- Max subscribers
- 500
- IP subscribers
- max 500
- Digital subscribers (UP0/E)
- max 24
- Analog subscribers
- max 20
- DECT (CMI)
- max 64
- SIP trunk channels
- 120 (max 8 SIP providers)
- ISDN S0 / BRI
- max 16
- ISDN S2M / PRI
- max 30
- Total trunk channels
- 250
- Conference channels
- 60
- Fax channels
- 8
- myPortal Desktop
- max 500
- myPortal @work
- max 250
- myPortal Outlook
- max 500
- myAttendant
- max 20
- myAgent (parallel agents)
- max 64
- Microsoft Teams Interworking
- max 500
- Power
- 100–240 V AC, 50–60 Hz (optional 48 V DC battery/UPS)
- Operating temperature
- +5 °C to +40 °C
- Humidity
- 5–85%
Key features
- All-in-one UC: voice, instant messaging, presence, voicemail, conferencing and contact center.
- Single-system scaling to 500 subscribers — IP (max 500), digital (24), analog (20), DECT (64) in parallel.
- 120 SIP trunk channels (up to 8 SIP providers) + 16 ISDN S0 + 30 ISDN S2M — 250 total trunk channels.
- Hybrid by design: SIP/IP, digital UP0/E, legacy analog and DECT cordless on one PBX — phased migration possible.
- 60 simultaneous conference channels + 8 fax channels (500 fax subscribers via UC Suite).
- myPortal clients: 500 desktop, 250 @work web, 500 Outlook integration, 20 myAttendant.
- Microsoft Teams Interworking — 500 users keep their corporate number while working in Teams.
- myAgent contact center: 64 parallel agents — with built-in ACD/IVR.
- On-premises: data stays in your network, no cloud dependency; optional UPS for power resilience.
- Current software release is OpenScape Business V4 (30.07.2026): X systems with a V3 mainboard and Business S move to V4 via a standard software upgrade; existing licences remain valid.
Typical applications
SMB headquarters — 30–100 user company, IP desk + DECT + Bluetooth headset on one PBX.
Branch connectivity — single dial plan between HQ and branch via SIP trunk; local survivability per site.
Call center — 20–50 agent operation with built-in ACD/IVR, weekly SLA reports via myReports.
Hotel — analog FXS room phones + reception CP series + housekeeping DECT, one platform.
Manufacturing — alarm capture and escalation from fire/security panels (together with OScAR).
Related Solutions
Related Products

OpenScape Business X3W — Wall-Mounted UC Platform
Wall-mounted, ice-blue UC platform — delivers the same 500-subscriber capacity as the X3R without a rack cabinet; ideal for office, clinic and retail scale IP + digital + analog + DECT mixes.
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OpenScape Business X5R — 3.5U Rack UC Platform (Mid-Size Enterprise)
3.5U rack UC platform for mid-market organizations requiring higher analog/ISDN port density — same 500-subscriber ceiling as X3R, but with much wider analog (68), ISDN BRI (48) and digital (56) port counts.
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OpenScape Business X1R — 1U Rack UC Platform (Small Office)
Compact 1U rack UC platform for small offices and branches — entry-level OpenScape Business model hosting IP, DECT and Bluetooth phones for up to 50 UC users on a single platform, connecting directly to cloud providers via SIP trunks.
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OpenScape CP410 IP Phone
Mid-to-upper segment IP desk phone — 3.5-inch color display, context-sensitive softkeys and expansion with up to 4 Key Modules; built for team leads and high call traffic.
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OpenScape CP710 IP Phone
Flagship of the CP G2 family — for executive offices and busy reception, with 5-inch color display, 18 dynamic keys, Bluetooth 5.0, NFC and full OpenScape UC integration.
DetailsCompact 2U rack UC platform for mid-size offices — a hybrid telephony system scaling up to 500 users, with IP, digital, analog and DECT endpoints on a single platform.

