SIP Trunk Configuration Instruction with Twilio Elastic trunking
Introduction
This article provides you with a step-by-step SIP Trunk Configuration of ProSBC with Twilio Elastic Trunking, using the Web Portal configuration tool. Complete the general installation configuration steps, before you begin configuring your specific scenario. In this guide FQDN is (telcobridges.pstn.twilio.com) configured in the Twilio console. You can find more details about how to create an Elastic Trunking in Twilio from the following link Create and Configure Trunks
Twilio Elastic SIP Trunk Example

Configuration Steps
(Step 1) Create IP Network
(Step 2) Create Protocol Stack
(Step 3) Create Call Route
NAP Configuration for Twilio Elastic Trunking
See Create SIP NAP
In this example, we will use telcobridges.pstn.twilio.com trunk information

NOTE: Connection to Twilio Elastic SIP Trunking is available in multiple geographic edge locations. If you wish to manually connect to a specific geographic edge location that is closest to the location of your communications infrastructure, you may do so by pointing your communications infrastructure to any of the following localized Termination SIP URIs:
{example}.pstn.ashburn.twilio.com (North America Virginia)
{example}.pstn.umatilla.twilio.com (North America Oregon)
{example}.pstn.dublin.twilio.com (Europe Ireland)
{example}.pstn.frankfurt.twilio.com (Europe Frankfurt)
{example}.pstn.singapore.twilio.com (Asia Pacific Singapore)
{example}.pstn.tokyo.twilio.com (Asia Pacific Tokyo)
{example}.pstn.sao-paulo.twilio.com (South America São Paulo)
{example}.pstn.sydney.twilio.com (Asia Pacific Sydney)
Click here for more information on Twilio Elastic SIP Trunking IP Addresses
Route Configuration for Twilio Elastic Trunking
In this example, we will create an outgoing and incoming routes for Twilio Elastic Trunk
Route for outgoing to Twilio

Route for incoming from Twilio

List of Parameters
Custom Parameters
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