Free Internal Calls, Extensions & Transfers
SimpleCallCenter isn't just a call center — it also works as your internal phone system with free calls and easy transfers between colleagues.
Free Internal Communication
Connect your team with free internal calls and extensions
Personal Extensions
Every user automatically gets a personal extension. Users can call each other by extension (or by name in the app) with no per-minute cost.
No External Charges
Internal calls stay inside the platform and don't consume external minutes or top-up balance, making team communication completely free.
Easy Internal Communication
SimpleCallCenter isn't just a call center — it also works as your internal phone system with free calls and easy transfers between colleagues.
Multiple Devices, One Identity
Each user can use their extension on multiple devices, all sharing the same identity
Desktop Hard Phones
Use your extension on any standards-compliant SIP desk phone for a traditional office phone experience.
SIP Softphones
Use any SIP softphone on desktop or laptop, giving you flexibility to work from anywhere with your extension.
Mobile App
Use the mobile app (Acrobits) on iOS/Android with push notification wake-up, so the app can be closed and still receive calls.
One Identity
All these devices share the same identity: the user's extension. One number, multiple devices, seamless experience.
Attended Transfers to Any Extension
During an inbound call, perform warm handoffs to any extension in the system
Attended Transfers
During an inbound call, an agent can perform an attended transfer to any extension. They first speak to the colleague, explain the situation, and only then complete the transfer.
Same Call Center
Transfers can go to another agent in the same call center for seamless team collaboration and escalation.
Cross-Call Center
Transfers can go to someone in a different call center on the same platform, enabling organization-wide collaboration.
Extension Users
Transfers can go to a user who only uses the system as an office phone with their extension, making escalation feel natural.
Personal Voicemail (Coming Soon)
Individual voicemail for each extension, separate from shared call center voicemail
Personal Voicemail
Coming soon: Each extension will get personal voicemail (not shared with queues) for individual message management.
Message Waiting Indicators
SIP subscription / MWI support so compatible phones show message waiting indicators when voicemails are received.
App Access
Access voicemail from the app/devices, separate from shared call center voicemail, for personal message management.
Natural Escalation Workflow
Escalation and warm handoffs feel natural — "Let me bring billing on the line and then I'll transfer you" is a real flow, not a workaround. Transfers can go to another agent in the same call center, someone in a different call center on the same platform, or a user who only uses the system as an office phone with their extension.