How does call forwarding work?
Redirection operates at the level of the PBX or SIP server. Once a call arrives on the given number or extension, the exchange decides based on the set condition whether to forward the call and where.
We distinguish three basic types of redirection:
- Unconditional redirect - Calls are always forwarded immediately, regardless of whether the line is free or busy.
- Redirection upon occupancy - activates only if the line or branch is currently busy with another call.
- Redirection on non-answer - The call will be forwarded to a backup number after ringing for the set duration without an answer.
The redirection destination can be another branch, a mobile number, voicemail, an IVR menu (automated voice guide), or an external number from another operator.
What is call forwarding used for by companies?
Call forwarding is a key function for ensuring continuous reachability. Typical uses in business practice:
- Redirection to an employee's mobile phone when away from the office: the customer calls the landline and the employee answers on their mobile.
- Backup redirection to a colleague when the responsible employee is absent.
- Redirection to voicemail outside working hours, combined with time conditions, the PBX distinguishes between working and non-working hours.
- Redirection to the service centre in the event of an office outage.
Correctly configured call forwarding prevents missed incoming calls and improves the customer experience without requiring manual intervention.
What to watch out for with call forwarding?
When redirecting calls to an external number, especially a mobile one, verify who bears the cost of the redirected call: typically it is the operator of the central system. For cloud-based systems, this is usually included in the tariff or billed per minute.
Pay attention to these points:
- Setting the maximum redirection depth to prevent infinite forwarding between numbers.
- A combination of redirection with time-based conditions to distinguish between working hours and non-operating periods.
- Informing the customer, some systems will play a notification tone, while others will switch over transparently without warning.
On virtualni-ustredna.cz you can set up call forwarding via the web interface and changes take effect immediately, without needing to contact support.
Frequently Asked Questions
Can a call be redirected to an international number?
Technically yes: the central system can forward calls anywhere. However, whether international forwarding is permitted and at what cost depends on your operator's tariff. Always check your tariff in advance.
What is the difference between call forwarding and call transfer?
Redirection occurs automatically before the call is answered: the customer never hears the original phone ring. Transfer is a manual action by the operator, who first answers the call and then manually redirects it to a colleague or another number.
Can the redirection be activated automatically at a specific time?
Yes, in combination with time conditions, the central hub automatically activates or deactivates call forwarding, for example, switching to voicemail every day after 17:00 or on weekends.