> ## Documentation Index
> Fetch the complete documentation index at: https://docs.kallin.co.uk/llms.txt
> Use this file to discover all available pages before exploring further.
# Configure Call Forwarding Settings for Your Kallin Numbers
> Configure call forwarding on Kallin numbers — forward all calls, forward on no answer, or set up simultaneous ring to multiple destinations.
Call forwarding is the simplest way to redirect calls arriving on your Kallin numbers to wherever you or your team are available to answer. Whether you want all calls to go straight to a mobile, ring multiple team members at once, or fall back to another number if the first doesn't pick up, forwarding settings give you that flexibility in a few clicks — no complex routing rules required.
## Forwarding Types
Kallin supports five forwarding modes. Choose the one that matches how you want incoming calls to behave:
| Forwarding Type | How It Works |
| ------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **Unconditional Forward** | Every incoming call is immediately sent to the destination number without ringing the original number first. Use this when you always want calls answered at a specific location. |
| **No-Answer Forward** | The destination number rings first. If the call is not answered within a set number of seconds, it is automatically forwarded to a fallback destination. |
| **Busy Forward** | If the destination number is already engaged on another call, the incoming call is automatically forwarded to an alternative destination rather than receiving a busy tone. |
| **Simultaneous Ring** | All incoming calls ring multiple destination numbers at the same time. The first destination to answer takes the call; the other numbers stop ringing immediately. |
| **Sequential Ring** | Destination numbers are tried one at a time in a defined order. If the first number doesn't answer within the timeout, the call moves to the second, then the third, and so on. |
## Setting Up a Forward
In the Kallin dashboard, select **Numbers** from the left-hand menu. Click on the specific number you want to set up forwarding for to open its settings.
Inside the number settings panel, click the **Forwarding** tab. Any forwarding rules already active on this number are displayed here.
Select the forwarding type that matches your needs from the dropdown — Unconditional, No-Answer, Busy, Simultaneous Ring, or Sequential Ring.
Type the number you want to forward calls to. The destination must be a valid UK phone number in standard format, including the area code (e.g. 020 7946 0101 or 07700 900123). See International Forwarding below if you need to forward to a non-UK number.
If you selected **No-Answer Forward**, choose how many seconds the destination should ring before the call is forwarded. We recommend **20–30 seconds** — long enough for someone to reach their phone, but short enough that callers aren't left waiting too long.
Click **Save Forwarding**. Make a test call to your Kallin number to confirm the call routes to the destination as expected. If you're using no-answer forwarding, let the call ring through without answering to verify the fallback also works.
## Simultaneous Ring
Simultaneous Ring is particularly useful for sales teams or shared lines where you want the first available person to answer, regardless of which device they're on.
Key details for Simultaneous Ring:
* You can add **up to 10 destination numbers** to a simultaneous ring group.
* All destination numbers ring at the same time as soon as a call arrives on your Kallin number.
* The **first destination to answer** takes the call; all other ringing destinations are cancelled immediately.
* If no destination answers, the call falls through to whatever **no-answer fallback** you've configured (such as voicemail or a voicemail box).
* Destination numbers can be any valid UK landline or mobile — they don't need to be Kallin numbers.
To add destinations, click **Add Destination** in the Simultaneous Ring configuration and enter each number in turn.
## International Forwarding
Kallin supports forwarding calls to international numbers. To forward to a number outside the UK, enter the destination in international format, including the country code (e.g. +353 1 234 5678 for an Irish number).
Please be aware that forwarding to international destinations may incur **higher per-minute call charges** compared to UK-to-UK forwarding. Your current per-minute rates for international forwarding are shown in the **Billing** section of the dashboard. Check these rates before enabling international forwarding on a busy number to avoid unexpected charges.
**Avoid infinite forwarding loops.** Do not configure a forwarding destination that itself forwards calls back to the same Kallin number. This creates a loop where the call bounces indefinitely between numbers, consuming minutes and preventing the caller from ever getting through. If you suspect a loop, disable forwarding on the affected number immediately and review the routing chain end to end.
Combine forwarding with **time-based Call Routing rules** for a powerful out-of-hours setup. Create a routing rule that sends calls to your office landline during business hours, then automatically switches to a mobile number — or straight to voicemail — after hours and at weekends. This way, you maintain a single number for callers while your team always receives calls on the right device at the right time.
## Related Guides
Build advanced routing rules using time, day, caller ID, and more — beyond simple forwarding.
Add an IVR menu before forwarding to let callers self-select the right destination.