Acer ISDN 128 Surf USB User Manual download pdf (Page 28)

Fig. 16 - VoIP network with SIP soft-phone clients in FER network

6.5.1 Configuration of ISDN modem for outgoing calls to ISDN network

In connection to ISDN network I had in hand a cheep PCI passive ISDN card with a

Winbond 6692 chipset. For parameters of this card see below.

ISDN Winbond 6692 chipset

ISDN interface S/T (ITU-T I.430)

ISDN signalizing DSS1 (EuroISDN)

B channel protocol Multi-link PPP/128 kbit/s

PPP async to sync HDLC

transparent

CAPI 2.0 compatible Yes

Computer interface PCI 2.0

Tab. 18 -Specification of ISDN modem

6.5.1.1 Installation of ISDN modem

For ISDN cards are two drivers in Linux, either ISDN4Linux or CAPI4Linux. I selected the

first driver ISDN4linux because CAPI is not included in the Asterisk distribution. ISDN4linux

drivers should be supported like module or direct in Linux kernel (from ver. 2.2 and more).

First we have to make sure if Linux has the isdn4linux module installed, i.e with modprobe.

For ISDN card with Winbond 6692 chipset:

$ modprobe hisax type=13

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Acer ISDN 128 Surf USB User Manual Page 28