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Below are some configuration examples for the open source PBX AsteriskTM. These examples may vary depending on your software
versions, implementation type, and more.  These are examples taken from our most common customer configurations.

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Do you have a sample configuration for Trixbox?

Trixbox GUI Setup Entries - Inbound Service

1. Create an inbound route for your DID pointed to the function you are trying to accomplish.

2. Create a SIP trunk. SIP trunk details below. No registration is used.

	Trunk Name: ipcomms
	USER Context: from-pstn
	USER Details:
	allow=ulaw
	context=from-pstn
	dtmfmode=rfc2833
	host=64.154.41.100
	insecure=very
	nat=yes
	type=friend

3. Test DID.
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SIP Trunk Sample Entry - Inbound Service - g711ulaw
(Listed below is an example of what you would put in your SIP Trunk entry.)
 
Create a SIP trunk for g711ulaw.

Trunk Name: ipcomms

PEER Details:

allow=ulaw
context=from-pstn
dtmfmode=rfc2833
host=64.154.41.100
insecure=very
nat=yes
type=friend

USER Context: from-pstn

USER Details:

allow=ulaw
context=from-pstn
dtmfmode=rfc2833
host=64.154.41.100
insecure=very
nat=yes
type=friend
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SIP Trunk Sample Entry - Inbound Service - g729
(Listed below is an example of what you would put in your SIP Trunk entry.)
 
Create a SIP trunk for g729.

Trunk Name: ipcomms

PEER Details:

allow=g729
context=from-pstn
dtmfmode=rfc2833
host=64.154.41.100
insecure=very
nat=yes
type=friend

USER Context: from-pstn

USER Details:

allow=g729
context=from-pstn
dtmfmode=rfc2833
host=64.154.41.100
insecure=very
nat=yes
type=friend
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What do I do if my asterisk server has a private IP Address?

Please enter the following two settings (externip and localnet) at the top of your sip.conf file in the general section.  
If public, nothing needs to be added to the general section.  Depending on your setup, you might need to forward all ports 
to your Asterisk server's private IP address or put the private IP address of the Asterisk server on the DMZ.

externip=WAN IP address
localnet=192.168.1.0/255.255.255.0 (or whatever your private LAN is configured for)

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