Skip to main content

SIP Trunk settings for use with 3CX

Hugo Miggels
Updated

These instructions are intended for use with 3CX V18 or lower. Otherwise follow our 3CX V20 Trunk Settings.

Download our 3CX Provider Template (V18) here: 3CX SIP Trunk template V18

 

Below is an overview of the recommended settings for use of our SIP trunks with 3CX V18.

 

3CX Trunk Settings

General

Trunk Details

  • Registrar/Server/Gateway Hostname or IP: 176.9.130.18 or nl.sip.callto365.com (check auto discovery)

Make sure to allow IP in the 3CX IP Blacklist

 

Authentication

  • Authentication ID: Trunk username
  • Authentication Password: Trunk password

Screenshot of General Settings

---

DIDs

Add your DIDs in E164, replacing the country code. For example +31302003650 should be entered as *302003650.

---

Caller ID

Default Outbound Caller ID

Configure your default outbound caller ID here

 

Reformat Incoming or Outgoing Caller (Example is for NL - update accordingly)

Inbound

Source Pattern Replace Pattern
31(.*) 0\1
0031(.*) 0\1

Outbound

Source Pattern Replace Pattern
0(.*) 31\1

Screenshot of Caller ID Settings

---

Options

Advanced

  • PBX Delivers Audio - check this

Codec Priority

Match these between 3CX and the trunk, values are:

  • G.711 A-law
  • G.711 U-law
  • G722
  • G729

Screenshot of Options Settings

---

Inbound Parameters

Caller Number/Name Field Mapping:

  • "CallerNum" caller's number (default: From->user) => From : User Part
  • "CallerName" caller's name (default: From->display name) => From : Display Name
  • "CalledNum" number that has been dialed (default: To->user) => To : User Part


Check 'Call Source Identification'

  • To : User Part
  • "LineID" internal number of line

Screenshot of Inbound Parameters Settings

---

Outbound Parameters

  • Request Line URI : User Part => CalledNum
  • Request Line URI : Host Part => GWHostPort
  • Contact : User Part => AuthID
  • Contact : Host Part => ContactUri
  • To : Display Name => CalledName
  • To : User Part => CalledNum
  • To : Host Part => GWHostPort
  • From : Display Name => OriginatorCallerID
  • From : User Part => AuthID
  • From : Host Part => GWHostPort
  • User Agent : Text String => Leave default value
  • Remote Party ID - Called Party : Display Name => OriginatorCallerID
  • Remote Party ID - Called Party : User Part => OriginatorCallerID
  • Remote Party ID - Called Party : Host Part => Leave default value
  • Remote Party ID - Calling Party : Display Name => OriginatorCallerID
  • Remote Party ID - Calling Party : User Part => OriginatorCallerID
  • Remote Party ID - Calling Party : Host Part => GWHostPort
  • P-Asserted Identity : Display Name => OriginatorCallerID
  • P-Asserted Identity : User Part => OriginatorCallerID
  • P-Asserted Identity : Host Part => GWHostPort
  • P-Preferred Identity : Display Name => Leave default value
  • P-Preferred Identity : User Part => Leave default value
  • P-Preferred Identity : Host Part => Leave default value
  • P-Called-Party-ID : Display Name => Leave default value
  • P-Called-Party-ID : User Part => Leave default value
  • P-Called-Party-ID : Host Part => Leave default value

Screenshot of Outbound Parameters Settings

 

Voice Platform Trunk Settings

The default device settings are normally compatible for use with 3CX, meaning with a new trunk no changes are needed for it to work. Below are the values for reference.

 

Caller ID

Number: Leave empty or enter a DID for use as a fixed outbound caller ID

Localize PAI: Yes

Pass PAI: Global or Yes

Use ANI: No

Incoming Call Caller ID Presentation: Presentation Allowed, Passed Screen

Block Caller ID: No

Use random number: No

 

Network Related

Media control - canreinvite: No

NAT: No

Qualify: No or Yes 1000 ms - depending on your preference

 

Codecs (selected, in order)

G.711 A-Law (PCMA)

G.711 u-Law (PCMU)

G.722

G.729

 

Advanced

Fromuser: Empty

Fromdomain: Empty

Trustrpid: Yes

Sendrpid: No

Insecure: Port: unchecked / Invite: unchecked

Disable global pass_privacy: No

Usereqphone: No

Custom SIP Header: Empty (or 'Privacy: id' if you want to call anonymous)

Grace Time: 0s

Progressinband: No

Video support: No

Allow duplicate calls: Yes

Fake ring: no

Language: en

Change Failed Code To: Leave as it is

Forward DID: Empty

Anti-resale: No

Time limit per day: 0 min

Time limit per month: 0 - 1 Day of reset

Transport: udp

T.38 Support: Yes

SIP Session timers: Default

SIP Session refresher: Default

SIP Session Expires: 1800 seconds

SIP Min Session: Empty

SRTP Encryption: No

 

Related articles

Comments

0 comments

Please sign in to leave a comment.

Powered by Zendesk