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SIP Integration Overview

SIP (Session Initiation Protocol) integration allows you to connect your existing telephony infrastructure with Callers. You can use SIP for both incoming and outgoing calls:
  • Incoming Calls: Receive calls from your SIP provider to Callers
  • Outgoing Calls: Make calls from Callers through your SIP provider
  • Bidirectional: Use the same numbers for both incoming and outgoing calls
Your SIP provider will need to whitelist our IP address:
35.245.182.192
Alternatively, you can use DNS: sip.callers.aiImportant: This IP/DNS can only be used for inbound calls to Callers. It cannot be added to your allowed IPs list for receiving outbound calls from us.

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Setting Up SIP Integration

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Step 1: Access SIP Integration

  • Go to the App Center tab on your Callers dashboard
  • Find SIP under the TELEPHONY & COMMUNICATION section
  • Click on the plus button in the SIP Integration block
connect sip button

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Step 2: Configure SIP Details

  • SIP Name: Enter a descriptive name for this SIP connection
  • E.164 syntax: All phone numbers must use the format: [+] [country code] [area code] [number]
  • Outbound Authentication Settings:
    • Enable if your SIP provider requires authentication
    • Username: Your SIP authentication username
    • Password: Your SIP authentication password
  • Advanced Settings:
    • Tech Prefix: Enable if required by your provider
    • SIP Diversion Header: Enable for authenticated outgoing calls
    • URL: Your SIP provider’s endpoint URL
    • Port: Default is 5060 (or as specified by your provider)
  • Gateway Configuration: Enable to use the same numbers for both incoming and outgoing calls
configure sip
Click Next to proceed.

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Step 3: Add Phone Numbers

After the initial setup:
  1. You’ll be prompted to enter your SIP phone numbers
  2. Alternatively, access the Phone numbers tab and click Add SIP Numbers anytime

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Multiple SIP Connections

You can set up multiple SIP connections to:
  • Work with different providers
  • Set up redundancy
  • Route calls through different providers based on regions or cost
To add another SIP connection:
  • Go to the Integrations tab
  • Click Connect in the SIP Integration section
  • Configure the new connection’s details
multiple sip

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Contact Fields in SIP Headers

All contact fields are included in the SIP headers to ensure comprehensive integration and communication. This allows for:
  • Seamless data transfer
  • Complete call handling information
  • Proper call routing
  • Support for advanced features like call forwarding
For more details on call forwarding capabilities, see the Call Forwarding section.

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Provider-Specific Guides

For detailed instructions on setting up specific SIP providers, please refer to our integration guides in the sidebar.