ATech Machine LIBRA-02 M Información técnica descargar pdf (Pagina 175)

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When installing telephony hardware, be sure you update the /etc/dahdi/

modules file to enable the appropriate modules for your hardware and

then reload DAHDI with the init script (/etc/init.d/dahdi). You can use

the dahdi_genconf modules command to generate the modules file for

your system as well.

Most PRI circuits in North America will use a T1 with the following characteristics:

• Line code: B8ZS (bipolar with 8-zeros substitution)

• Framing: ESF (extended superframe)

You will need to configure two files. The /etc/dahdi/system.conf file should look some-

thing like this:

loadzone = us

defaultzone = us

span = 1,1,0,esf,b8zs

bchan = 1-23

echocanceller = mg2,1-23

hardhdlc = 24

And the /etc/asterisk/chan_dahdi.conf file should look like this:

[trunkgroups]

[channels]

usecallerid = yes

hidecallerid = no

callwaiting = yes

usecallingpres = yes

callwaitingcallerid = yes

threewaycalling = yes

transfer = yes

canpark = yes

cancallforward = yes

callreturn = yes

echocancel = yes

echocancelwhenbridged = yes

relaxdtmf = yes

rxgain = 0.0

txgain = 0.0

group = 1

callgroup = 1

pickupgroup = 1

immediate = no

switchtype = national ; commonly referred to as NI2

context = from-pstn

group = 0

echocancel = yes

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