ATech Machine LIBRA-02 M Technické informace stáhnout pdf (Strana 184)

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over SIP. In our example, we will creatively refer to the two servers as serverA and

serverB.

The first file that must be modified is /etc/asterisk/sip.conf. This is the main configura-

tion file for setting up SIP accounts. First, this entry must be added to sip.conf on

serverA. It defines a SIP peer for the other server:

[serverB]

;

; Specify the SIP account type as 'peer'. This means that incoming

; calls will be matched on IP address and port number. So, when Asterisk

; receives a call from 192.168.1.102 and the standard SIP port of 5060,

; it will match this entry in sip.conf. It will then request authentication

; and expect the password to match the 'secret' specified here.

;

type = peer

;

; This is the IP address for the remote box (serverB). This option can also

; be provided a hostname.

;

host = 192.168.1.102

;

; When we send calls to this SIP peer and must provide authentication,

; we use 'serverA' as our username.

;

username = serverA

;

; This is the shared secret with serverB. It will be used as the password

; when either receiving a call from serverB, or sending a call to serverB.

;

secret = apples

;

; When receiving a call from serverB, match it against extensions

; in the 'incoming' context of extensions.conf.

;

context = incoming

;

; Start by clearing out the list of allowed codecs.

;

disallow = all

;

; Only allow the ulaw codec.

;

allow = ulaw

Be sure to change the host option to match the appropriate IP address

for your own setup.

148 | Chapter 7: Outside Connectivity

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