Introduction
Posh is a third-party AI application used by financial institutions to assist callers with account-related inquiries.
Calls are routed through the Netsapiens/VIP platform and passed to Posh via a vendor SIP trunk. If the caller requires further assistance, the Posh application will route the call back to the Netsapiens platform—either to a live agent or another destination on the Netsapiens/VIP system. Posh uses a SIP REFER method to send the call back over the vendor trunk. For more information on POSH, visit their website at: https://www.posh.ai/.
This guide provides the steps to create a POSH AI integration.
Overview
Required Steps:
- Create Vendor SIP Trunk
- Configure Phone Number Routing
- Provide Posh with REFER Destinations
NOTE: Call routing requirements should be discussed with the customer based on their operational needs.
Call Flow Example
- A call routes inbound to the Netsapiens/VIP platform via a hosted DID/phone number within the customer’s domain.
- This phone number is automatically routed over the vendor SIP trunk to Posh.
- Posh handles the call. When the caller says “Crexendo test”, Posh routes the call back to an Auto Attendant (ext. 1000) on the PoshPOC domain.


POSH SIP Trunk Configuration Requirements
- TLS (signaling) — SIP TCP port 5061
- SRTP (audio encryption)
Refer to POSH documentation for further configuration details: https://crexendo-vip.s3.us-west-2.amazonaws.com/PoshAIDocs/Posh+Voice+SIP+Configuration+v7.1.pdf
Step 1: Configure SIP Trunk in Netsapiens Portal
- Log in to the Netsapiens Portal.
- Navigate to SIP Trunks → Add SIP Trunk.

- Complete the Basic tab using the following information (details provided by Posh Engineering):


- Under Dial Planning & Limits, configure the following:


- Select “Save.”
Step 2: Finalize the SIP Trunk in Netsapiens SiPBX (Admin)
- Log in to the Netsapiens SiPBX (Admin) portal.
- Navigate to Connections → Connections.
- At the bottom of the screen, change the domain filter to the domain where the SIP trunk was created, then click Refresh.
- Locate and open the Posh SIP Trunk.

- Edit the following fields:


- Select “Modify” to save your changes.
Your POSH vendor SIP trunk is now configured and ready for testing.