Forward
To make a call between a panel and an indoor video entry phone (monitor) by pressing the button of the required apartment or entering its number, the panel and the monitor must have the same building and unit number in apartment settings. Also for monitors, you must indicate corresponding information about the floor, apartment, and device number.
If there is no monitor, it is turned off or such settings are missing, you must make forward queues for apartments to redirect calls to IP addresses or SIP numbers.
Second SIP Account
BAS-IP panels support two independent SIP accounts. The second SIP account can be enabled in addition to the primary one to provide parallel calling, alternative routing, or redundancy. Both accounts have separate registration parameters and their own call logic.
The panel can use the second SIP account simultaneously with the first one or switch between them depending on the selected configuration.
Use Cases for the Second SIP Account
❶ Parallel calls to two different systems
The panel sends an outgoing call to both SIP servers at the same time, allowing multiple systems to receive the call in parallel.
Typical configurations:
SIP 2 → Local SIP PBX, VoIP provider, or third-party intercom system.
This ensures that all devices registered in either system can receive the call.
❷ Independent routing for different buttons
For multi-button panels, each button can be linked to a different SIP account.
Examples:
Button 1 calls residents via SIP 1;
Button 2 calls security or concierge via SIP 2;
Button 3 calls a service office or management company via SIP 2.
This allows a single panel to handle several communication flows.
❸ Backup SIP line (failover)
The second SIP account can serve as a fallback.
Behavior example:
The panel tries SIP 1 first;
If SIP 1 is not registered or unavailable, the call is placed through SIP 2 automatically.
Useful for:
Projects requiring guaranteed availability;
Multi-operator VoIP setups;
Locations with unstable internet on the primary server.
❹ Separate call destinations for apartment and mobile apps
Some integrators prefer to send:
SIP 1 → indoor monitors;
SIP 2 → SIP softphones or mobile SIP clients.
This allows splitting the call flow between hardware and mobile devices.
❺ Integration with external services
The second SIP account can be dedicated to:
Guard/security centers;
Concierge software;
Recording servers;
Voicemail or call logging systems;
Smart building platforms that require SIP signaling.
❻ Migration or coexistence during infrastructure change
When moving from one SIP platform to another, the panel can keep:
SIP 1 on the old platform;
SIP 2 on the new platform.
This allows uninterrupted operation during system migration.
Both SIP accounts are fully independent in registration, availability, and call rules;
Actual routing logic may vary depending on the panel model (Linux or Android);
When using BAS-IP Link, ensure that call routing within the project is configured correctly for both SIP lines.
During a call, the entrance panel checks its forwarding queue only when it fails to find any monitors according to the entered values of the building, unit, floor, and apartment. If you want to enable the Forwarding from the beginning (without searching the corresponding monitor via the internal protocol), you need to set different logical addresses for the panel and the monitor. For a detailed explanation of correct logical address configuration, please refer to the Forwarding from the entrance panel article.
Forward settings
Two forwarding modes are available:
all at once: the call is made to all numbers simultaneously.
one by one: the call is made to the numbers in turn with a 20-second delay.
How to make a new forward queue
Log in to the entrance panel web interface using the admin username and the password you created when first setting up the device or after a factory reset.
Open the Forward tab and click New Forward.
Enter your Apartment Number which consists of the floor and room number. For example, 223 indicates apartment 23 located on the 2nd floor. Entering this number on the panel the queue will work.
The apartment number is formed from two values: floor No. and the apartment No. This data is also entered in the monitor address settings. For example, number 101 corresponds to an apartment located on floor No. 01 (0 at the beginning can be omitted when entering) and apartment number 01. If you want to create forwarding for apartnemt No. 50 located on the 10th floor, in the Apartment number field you must enter 1050.
Enter the Forward Number (directions for call forwarding). You can add up to 8 numbers for forwarding. Calls can be made both via P2P and via the SIP protocol.
Format for calls via P2P:
Two formats for numbers are available:
sip:1@192.168.1.65, where 1 is the desired number to be displayed for the callee, 192.168.1.65 is the IP address of the callee SIP client (if you use a softphone, the IP address of a device where the softphone is installed);
sip:192.168.1.65, where 192.168.1.65 is the IP address of the callee SIP client (if you use a softphone, the IP address of a device where the softphone is installed).
Format for calls to SP-02 is:
sip:192.168.1.99, where 192.168.1.99 is the IP address of the callee handset.
Format for calls via SIP:
sip:5588@us.sip.bas-ip.com, where 5588 is the callee SIP number, us.sip.bas-ip.com is the address of the SIP server, which can be either the IP address or domain name.
You can also use the short form and enter only the callee SIP number of the called device ("sip:" at the beginning and the SIP server address can be skipped). So, it is enough to enter 5588.
For the forwarding correct function, the SIP numbers in one queue must be registered on the same SIP server. For example, forwarding will work for your SIP numbers registered on the us.sip.bas-ip.com server.
Save the forward queue by clicking Confirm.
Forwarding will work correctly even if numbers for both P2P and SIP calls are entered in the same queue.