Page 519 - Asterisk™: The Future of Telephony

vpb.conf

This file is used to configure Voicetronix cards with Asterisk. See the sample vpb.conf
for more information.

zapata.conf

The zapata.conf file is used to define the relationship between Asterisk and the Zaptel
driver. Because zapata.conf is specific to Asterisk, it is located with the other Asterisk
configuration files in /etc/asterisk/. As with zaptel.conf, the zapata.conf file contains a
multitude of choices reflecting the multitude of hardware it supports, and we won’t try
to list all of the options here. In this book we’ve covered only the analog interfaces to
the Zaptel driver, as described in Chapter 3.

zaptel.conf

The zaptel.conf file is not located with the other Asterisk .conf files; the Zaptel driver is
available to any application that can make use of it, so it makes more sense to store it
in a non-Asterisk-specific directory (/etc/). zaptel.conf is parsed by the ztcfg program to
configure the TDM hardware elements in your system. You configure three main ele-
ments in the zaptel.conf file:

• A way of identifying the interfaces on the card within the dialplan
• The type of signaling the interface requires
• The tone language associated with a particular interface, as found in zonedata.c

Be very careful not to plug your FXS module into a telephone line. The
voltage associated with the phone line, especially during an incoming
call, will be much too high for the module to handle and may perma-
nently damage it, rendering it useless!

Within the zaptel.conf file, we define the type of signaling that the channel is going to
use. We also define which channels to load. The options in the configuration file are
the information that will be used to configure the channels with the ztcfg command.
The actual parameters available in the zaptel.conf file are quite extensive, as a wide
variety of PSTN interfaces make use of the Zaptel telephony engine. Also, as this tech-
nology is rapidly evolving, anything we write now may not be accurate by the time you
read it. Consequently, we won’t try to list all of the options here.
In this book, we have focused on the Zaptel analog interfaces as provided by the Digium
TDM400P card (see Chapter 3).

vpb.conf | 491