Mar 14, 2010 - Setting up a SIP trunk can be a confusing and aggravating task, but FreePBX makes things much easier. In this guide, we'll go through the.

• Cisco Sip Trunk Configuration
• Trix Box Download

The following Configuration Guides are intended to help you connect your SIP Infrastructure (IP-PBX, SBC, etc) to a Twilio Elastic SIP Trunk.

Be aware, due to the large number of versions, variations, add-ons, and options for many of these systems, the settings you see may differ from those shown in our Configuration Guides. As such, these documents are intended as general guidelines, rather than configuration templates. There is an assumption of familiarity with your network and SIP infrastructure, and how they work.

Twilio cannot provide direct support for third-party products; you should contact the manufacturer for your PBX/SBC for assistance in configuring such products.

If you wish to share your PBX or SBC configuration guide to help us improvethis section for other users, kindly submit them or any corrections to theexisting guides to sip.interconnectionguides@twilio.com.

IP-PBX

Asterisk IP-PBX

Assuming you have Asterisk already set up as your IP-PBX, with one or moretelephones configured and running calls between them, the following guide provides detailed step-by-step instructions of how to configure your Trunk and your Asterisk IP-PBX.

Optionally, Twilio Elastic SIP trunking also provides Secure Trunking (SIP TLS and SRTP), see guide for configuration details.

FreeSwitch IP-PBX

Assuming you have FreeSwitch already set up as your IP-PBX, with one or moretelephones configured and running calls between them, the following Interconnection Guide provides you with step-by-step instructions to use FreeSwitch PBX with your Twilio Elastic SIP Trunk.

FreeSwitch using Secure Trunking

This is supported. At this time there is no guide published but reach out to support if you have any questions.

Twilio Elastic SIP trunking also provides Secure Trunking (SIP TLS and SRTP).

This guide provides the configuration steps required to implement FreeSwitch PBX using a Twilio Elastic SIP trunk using Secure Trunks.

3CX

Assuming you have your 3CX already set up with one or more telephonesconfigured and running calls between them, the following highlights specificconfiguration for use with your Twilio SIP Trunk.

• Add a new VoIP Provider account in the 3CX phone system: 'Twilio'
  • Set the SIP server hostname to: example.pstn.twilio.com
  • Set your Authentication ID/username and password (as you configured in your user credentials on your Twilio Trunk)
• DID’s and Inbound Call Identification: Enter your Twilio numbers under the 'DID' tab.
• 'Advanced' under 'Codec priorities' only include G711 U-law
• Create Outbound Call Rules: setting calls to numbers with a length of 10, and also prepend a '+1'. This will ensure E164 formatting.

Cisco Sip Trunk Configuration

Elastix

If you want to use Elastix IP-PBX with your Twilio Trunk, the following guide provides detailed step-by-step instructions of how to configure your Trunk and your IP-PBX.

FreePBX

Assuming you have FreePBX already set up as your IP-PBX, with one or moretelephones configured and running calls between them, the following highlightsspecific configuration for use with your Twilio Trunk.

GrandStream UCM

The following Interconnection Guide provides you with step-by-step instructions to use GrandStream UCM with your Twilio Elastic SIP Trunk.

Mitel MiVoice Business 7.2

The following guide is not maintained by Twilio. Please see Mitel Knowledge base for latest guide.

Enterprise Session Border Controller (E-SBC)

Acme Packet SBC

Assuming you have your SBC already set up with your IP-PBX, with one or moretelephones configured and running calls between them, the following highlightsspecific configuration for use with your Twilio trunk.

Cutting list software mac. Make sure you have your Network & Physical Interfaces appropriately configured.

Configure your Trunk SIP Interface towards Twilio:

Configure your Session Agent towards Twilio:

The second example presented here illustrates adding +1 to called numbers (Toand Request-URI headers) for all SIP trunk endpoints in a particular realm.

Firstly, define the session-translation with a called rule:

Then define the rule to append +1:

Lastly, apply the translation as outgoing to the SIP trunk realm:

Set the preferred codec to G711 mu-law. In the example below, the Net-Net SDmanipulates the codec list for all PBXs in the PBXs realm such that PCMU appearfirst in the media descriptor offered to the SIP trunk:

Cisco ISR (Cisco 28xx, 29xx, 38xx, 39xx, 43xx etc.)

Assuming you have your ISR already set up with one or more telephonesconfigured and running calls between them, the following highlights specificconfiguration for use with your Twilio Trunk.

If you use credentials for outbound calls, you must use the B2BUA built intoCisco IOS:

Update your Trust List:

• TWILIO accepts 'Early offer' only, so Cisco users/partners would have to force call as Early offer.
• Use SIP normalization profile to change 'From' header to include IP address of CUBE router instead of DNS name

Ensure all numbers use full E.164 format, so transform all outbound calls toE.164 before sending to Twilio. The rules below are doing 2 things: changingthis outbound call from 919803331212 to +19803331212 and changing the ANIfrom 4002 to 9802180999.

Lastly, you may have a dial-peer with 91[2-9].[2-9]... in order to catch thecalls. You can see the translation profile that is applied to translated thenumber to E.164. Also ensure G.711 codec is used. The ‘session targetsip-server’ is what target the sip B2BUA configured above with the ‘sip-ua’command.

Sonus E-SBC 5000 using Microsoft Lync

Assuming you have your E-SBC already set up, the following highlights specific configuration for your Sonus E-SBC for interworking with Microsoft's Lync Server 2013 environment using your Twilio Trunk.

Audiocodes SBC

Assuming you have your SBC already set up with your IP-PBX, with one or moretelephones configured and running calls between them, the following highlightsspecific configuration for use with your Twilio Trunk.

Make sure you have an IP Group defined with:

Define your Proxy IP:

Have a Coders Group with:

You will also need to define your IP Profiles & Routing rules.

AudioCodes using Microsoft Lync

Assuming you have your E-SBC already set up, the following highlights specific configuration for your AudioCodes E-SBC for interworking with Microsoft's Lync Server 2013 environment using your Twilio Trunk.

EdgeMarc

Assuming you have your SBC already set up with one or more telephonesconfigured and running calls between them, the following highlights specificconfiguration for use with your Twilio Trunk.

Navigate to 'VoIP'>'SIP' to configure the SIP server info for Twilio. Enter inthe SIP Server FQDN assigned for these services under the SIP Server Addressfield. Fill in the SIP Server Domain field with the proper Twilio domain.

Note: Make sure to check the 'Limit Inbound to listed Proxies' and 'LimitOutbound to listed Proxies' boxes to help prevent fraudulent activity sourcedfrom a LAN side PBX or a WAN side DoS attack.

Navigate to 'VoIP ALG' and then 'B2BUA' to configure the SIP Trunk registration with thesoft-switch (between the EdgeMarc and the WAN side soft-switch), the PBX forSIP registration mode (between the PBX and LAN side of the EdgeMarc), inboundrule (for sending SIP messages from the WAN side of the EdgeMarc to the PBX)and outbound rule (for sending the SIP messages from the EdgeMarc to the WANsoft-switch). RFC-4904 support will be handled by applying header manipulationaction rules to the matched outbound rules.

Configuring the PBX for SIP registration mode (between PBX and the EdgeMarc).From the 'Trunking Devices' section:

• Click the 'New Row' button to get to a new entry for a Trunking Device.
• Enter a PBX name in the 'Name' field.
• Select the correlating PBX from the drop-down list of the 'Model' field.

• Select IP Registration mode by selecting the radio button for using the IP field and Port field.
• Enter the PBX IP in the 'IP' field.
• Enter 5060 in the 'Port' field. Click 'Update' to create a Trunking Device for PBX. Click 'Submit' at the bottom of the page to send the config to the EdgeMarc.

Configure the EdgeMarc default inbound rule (for sending the SIP messages fromthe EdgeMarc to the PBX). This is required in order for non-pilot DIDs toreach the PBX.

From the Actions section:

• Click the 'New Row' button to get a new entry for creating an inbound action.
• Enter the action name in the 'Name' field.
• Select the radio button of 'Trunking Device'.
• Select the PBX from the drop-down list next to 'Trunking Device'.

• Click the 'Update' button.

From the Match section:

Trix Box Download

• Click the 'New Row' button to get a new entry for an inbound rule.
• Select 'Inbound' in the 'Direction' field.
• Select the radio button of 'Default'.
• Select 'InboundAction' from the drop-down list of the 'Action' field.
• Click the 'Update' button.

From the Match section:

• Click the 'New Row' button to start a new entry for an outbound rule.
• Select 'Outbound' in the 'Direction' field.
• Select the radio button of 'Pattern match', select 'Calling' from the drop-down list and enter a '.' or match the partial DID map (for example, if there is 6785551111-1115, then use 678555111X) in the 'Pattern match' field to match any calling numbers.
• Select 'Any' from the 'Source' field.
• Select OutboundAction1 from the drop-down list of the 'Action' field.
• Click the 'Update' button.

• Click 'Submit' at the bottom of the page to send the config to EdgeMarc.

inGate SIParator

The following Interconnection Guide provides you with step-by-step instructions to use inGate SIParator E-SBC with Twilio Elastic SIP Trunk. Optional steps to configure SIP over TLS and SRTP (Secure Trunking) are also included in this guide.

Sansay

Assuming you have your SBC already set up with one or more telephones configured and running calls between them, the following highlights specific configuration for use with your Twilio Trunk.

Other Network Elements

xCally Call Center

The following Interconnection Guide provides you with step-by-step instructions to use XCally Call Center your with Twilio Elastic SIP Trunk.

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