Knowledge Base
Business & Teams
Team calling, shared extensions, IVR, and multi-user setups.
4 answers · Part of 46 across the knowledge base
Can I connect my employees' iPhones to our office phone system?
Yes — any SIP-based office phone system works. For small teams, Groundwire (one-time $9.99/device) lets each employee connect their iPhone as a SIP extension. For larger deployments needing branded apps and server-side provisioning, Cloud Softphone handles zero-touch enrollment at scale.
How do I forward my office phone to my mobile when I'm out?
Yes. Almost every modern PBX (3CX, FreePBX, Asterisk, Cisco BroadWorks, RingCentral, Zoom Phone, NetSapiens) supports multiple registrations per extension. Both devices register, both ring, you answer on whichever you're closest to. Some PBXs also let you set a ring-delay sequence (desk phone first, Groundwire after 3 rings if no answer).
How do I get my team to receive calls from our business phone system on their personal phones?
Your PBX already speaks SIP (Session Initiation Protocol), the universal language of business VoIP. A SIP softphone app on a smartphone registers with your PBX exactly like a desk phone would — same extension number, same dial plan, same voicemail. Groundwire by Acrobits is a native iOS and Android app built for exactly this purpose: it turns any personal phone into a full-featured business extension.
Is there an app that lets me make and receive calls from my business number on my iPhone?
Yes. Groundwire is an iOS SIP softphone (one-time $9.99) that makes and receives calls using any SIP business number. Uses CallKit for a native call experience, push notifications for background ringing, and supports transfer, recording, and conferencing. Works with any SIP provider.