Configuration of modem and ISDN connections. For ISDN cards in Linux there are two drivers, either ISDN4Linux or CAPI4Linux. Which one to use depends on your ISDN card. Digium ISDN PRI cards use the ZAPATA drivers and are configure in the zapata.conf config file.

Examples:

Using a normal ISDN BRI card and grouping the two interfaces.

the /etc/asterisk/modem.conf

---

[interfaces]
context=remote
driver=i4l
language=en
type=autodetect
;This I'm doing directly in the extension.conf
;stripmsd=1

dialtype=tone
;dialtype=pulse

;mode=answer
;mode=ring
mode=immediate

; ISDN example

group=1
;registered one number.
msn=57881
;accepting several more. Could have used * as well
incomingmsn=57966,57881,57882,57883,57884,57885,57886,57887
device => /dev/ttyI0
device => /dev/ttyI1

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Referenses

• ISDN4Linux: ISDN4Linux connections
• CAPI channels: CAPI ISDN connections

See also

• Asterisk channels
• CAPI

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