Can a SIP number be forwarded to an existing phone line?
It is possible to use a SIP number while continuing to receive calls on an existing phone line. This setup allows businesses to benefit from a virtual number without changing their current phone infrastructure.
The SIP number acts as the public contact point, while incoming calls are routed according to the configuration you choose.
How SIP number forwarding works
Once a SIP number is activated, incoming calls can be redirected to another destination, such as a landline or mobile number. From the caller’s perspective, the experience remains unchanged: they dial the SIP number and are connected as usual.
This configuration is particularly useful for companies that want a local or international presence while keeping their existing phone line.
Call forwarding options and costs
When calls are forwarded to an external number, they are billed according to the forwarding rules and applicable call rates. Charges generally depend on the destination and the billing model selected.
To avoid call forwarding fees, calls can instead be received directly on a SIP-compatible device, such as:
- An IP desk phone
- A computer using a softphone
- A smartphone with a VoIP application
In this case, calls are handled over the internet rather than being redirected to a traditional phone line.
Documents required for number activation
Activation of a SIP number requires document verification. The exact requirements depend on the country of the number.
Commonly requested documents include:
- A copy of an ID card or passport
- A company registration document for business use
For certain destinations, such as Spain, Switzerland, and Belgium, a local address is also required. This address must include street name, number, city, and postal code.
Additional configuration options
SIP numbers can be customized to match specific business needs. A personalized welcome message can be configured for each number, including multilingual greetings when required.
Advanced routing options, such as cascade call forwarding, allow calls to be redirected to multiple destinations in sequence if the first destination is unavailable.
SIP numbers and related services are offered by sellers listed on the Hivoox marketplace. Each seller specifies the available destinations, document requirements, and configuration options, allowing businesses to choose solutions adapted to their communication strategy.