This was described in the previous article. The name of this extension is arbitrary. Also called bipolar, this is a synchronous clock encoding technique in which binary 0 is represented by the absence of an electrical charge, while binary 1 the mark is alternately represented by positive and negative charges. This is necessary in many countries, including the Netherlands. Set the country-code for the tonezone entries in zaptel. Prevents international calls from being missed because the dial plan is missing a variation of the phone number associated with this channel that includes two leading zeros follow by the country code and the area code.

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Sets the ISDN switch type, in this case to pck. Detect any Zaptel modules, unload all of them and load them again one at a time. This is a script that is used to generate a new Zaptel configuration file. In this case everything was detected correctly on the first attempt. Spans are identified by incrementing numbers starting with 1.

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Use this command to show which Zaptel modules are currently loaded:. This is necessary in many countries, including the Netherlands. Set the country-code for the tonezone entries in zaptel. For outgoing calls, a choice must be made in the dial plan regarding which hfcs to use. Defines the channel or range of channels.


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Without any comments, the contents of the file look like this:. This is also why it is necessary to specify a line coding scheme for the B-channels.

Otherwise, the name of this section is arbitrary. Pck other things, this shows that the card is being run by vzaphfc ; one of a number of kernel modules that are shown to be loaded by the lsmod command:. The value used here is arbitrary, but must be matched in the dial plan. The default is us.

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Although the command may be followed by specific span numbers, by default ztscan prints out information on all available spans. When the zaptel-modules package was compiled and installed, a number of extra modules were added to the running kernel, such as ztdummy. Sets a dial plan parameter. Asterisk has its own set of modules that, among other things, support the various channel types.

In both cases, the calls will be connected on to the channel for the previously configured SIP phone. In countries where the telco decided long ago to use some unusual version of this protocol, many popular telephony solutions various SIP adapters, Asterisk, etc.


Loads the indication tones oci toneetc. It is possible to reload the Zap channel module on the fly, but that will not reconfigure all of the options.

The hfcc-s span is numbered “1” to make it the primary timing source on the system, accepting timing from the telco. This is in addition to SIP calls for extension Various protocols exist for CID transmission, but unfortunately some are less popular than others.

Universal Microelectronics: Drivers for ISDN-Cards

Sets the span number. First, simply delete the buggy zaphfc module to ensure that only the correct one is used:.

A span is a logical unit that represents a group of channels. So, a variation of it to reveal more detailed information about a specific ISDN span also works:. The latter is used mostly in North America.

LAPB, however, is irrelevant for Asterisk, because when the B-channels are used for voice they carry no signaling at all: In this example, the ZAP channel is only used for outgoing calls if extension is dialled. This frequently complicates matters, first of all because zaphfc.

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