FireBrick SIP Configuration
Also see: FireBrick VoIP Page which has more details about the feature.
(This is a first draft and may need updating. - 10 October 2010)
The FireBrick can be used for VoIP by being a VoIP gateway. Your local (or remote) SIP devices register against the FireBrick, and the FireBrick registers to your SIP provider.
You can have multiple SIP provider (carrier) accounts, and incoming calls can be routed to internal extensions and these extensions can be individual phones or a group which can then ring multiple phones in various ways. An advantage of using the FireBrick in this way is where you are forced to use RFC1918 IP addresses (private) on your LAN and the FireBrick is NATing traffic. Typically the FireBrick will be connected to the ISP by PPP itself.
Taking an example of a single SIP account with AAISP, and a couple of SIP phones, a FireBrick can be configured as follows.
We'll set this up so that incoming calls route to a 'ring group', which in turn will route to a number of internal extensions. Outgoing calls from the local phones will all go out via the single SIP account with the service provider.
Go to Config - Edit - Setup - Edit VoIP config.
Add a carrier
This is the SIP account that you're connecting to:
|Comment||Main Office Number|
SIP account name (Phone number)
|password||SIP account password|
|registrar||SIP Registrar server: registrar.aasip.co.uk|
|proxy||SIP Proxy server, proxy.aasip.co.uk|
|extn||Internal extension number to call for incoming calls, 100|
|allow||IPs that are allowed to talk SIP to us (ie providers IPs), 188.8.131.52-119|
|display-name||Name shown on phones, Office}|
Click Save. xml:
<carrier name="AASIP" display-name="Main" allow="184.108.40.206-119" registrar="registrar.aasip.co.uk" proxy="proxy.aasip.co.uk" username="01234567890" password="secret" extn="100" comment="Main Office Number"/>
If you go to Status - VoIP, you should see the Carrier listed with an expiry - this shows that the FireBrick is registered to the server
Next create some users:
These will be your local SIP user accounts that your telephones use to register against the FireBrick with. Go to: Config - Edit - Setup - Edit VoIP config Add new VoIP user:
|allow||IPs that are allowed to register, put in your LAN ip addresses, eg, x.x.x.x/27|
|ddi||The full number for this user, ie same as the carrier's number assigned to you.|
|extn||John's internal extension number, eg 101|
|carrier||Pick AASIP, this will be the carrier John uses to dial out on|
|max-calls||1, if you just want to make 1 call at a time with this account|
<telephone name="John" display-name="John" username="john" password="secret" allow="192.168.1.0/24" ddi="+441234567890" extn="101" carrier="AASIP" max-calls="1"/>
You can repeat this process for your other users, changing the extn each time, eg 102, 103 etc. At this point you can configure your SIP phones to register to the FireBrick with the credentials you've specified above. You can then test by calling each other using the extn numbers assigned. You will also be able to dial out. If you go to Status - VoIP, you should see the Telephones listed with an expiry, IP and the SIP user agent details - this shows that the SIP phones have registered to the FireBrick. Incoming calls will not work yet, as the Carrier above is set to send calls to extension 100, which we've not created... yet...
Create a Ring Group
This will be our ring group for incoming calls
Go to: Config - Edit - Setup - Edit VoIP config Click Add New
|display-name||The name that will display on the phone, eg Main|
|extn||100 - this is the extension number used in the Carrier section above|
|ddi||the telephone number.|
|ring||space separate list of the internal extension numbers to ring, eg 101 102 103|
|type||This is the ring type, eg to ring all at once etc.|
<group name="Main" display-name="Main" extn="100" ddi="+441234567890" ring="101 102 103" type="all"/>
SIP and RTP traffic will need to be allowed in to the FireBrick. This will need to be from the carrier, but also from external SIP phones if you have any. Take a look at this wiki page for more info: FireBrick_2700#VoIP_Rules FireBrick_2700#VoIP_Rules