Specifications

SWITCHware System Administration Manual50

* inband: Asterisk plays indication tones without answering; not available on all PRI/BRI subscription lines

* outofband: Asterisk disconnects with busy/congestion information code so the switch will play the

indication tones to the caller. Busy() will now do same as setting PRI_CAUSE=17 and Hang up().

Multi-link PPP Options

Min unused

The minimum number of unused channels available. If there are fewer channels available, Asterisk will not

attempt to bundle any channels and give them to the data connection. Takes an integer.

Min idle

The minimum number of idle channels to bundle for the data link. Asterisk will keep this number of channels

open for data, rather than taking them back for voice channels when needed. Takes an integer.

Idle dial

The number to dial as the idle number. This is typically the number to dial a Remote Access Server (RAS).

Channels being idled for data will be sent to this extension. Takes an integer that does not conflict with any

other extension in the Dial plan, and has been defined as an Idle ext.

Idle ext

The extension to use as the idle extension. Takes a value in the form of exten@context. Typically, the

extension would be an extension to run the ZapRAS command.

Analog Trunk Features

Use distinctive ring detection

Whether or not to attempt to recognize distinctive ring styles on incoming calls.

Busy Detect

If enabled, Asterisk will analyze the audio coming in on the line during a call or a dial attempt to attempt to

recognize busy signals. This is useful on analog trunk interfaces both to detect a busy signal when dialing out,

and for detecting when the person has hung up. See also Disconnect Supervision. Be sure that you don't

use this on digital interfaces like quadBRI cards and so on. Otherwise you will run in "broken calls" problems.

default=no

Busy Count

This option requires busydetect=yes. You can specify how many busy tones to wait before hanging up. The

default is 3, but better results can be achieved if set to 6 or even 8. The higher the number, the more time

is needed to detect a disconnected channel, but the lower the probability mistaking some other sound as

being a busy tone.

Call Progress

Asterisk can attempt to monitor the state of the call to listen for a ringing tone, busy tone, congestion tone,

and sounds indicating that the line has been answered. It appears that this feature is independent of the

busy detect feature; it seems that both can run in parallel, and both will independently attempt to recognize

a busy tone. The call progress feature is highly experimental and can easily detect false answers, so don't

count on it being very accurate. Also, it is currently configured only for standard U.S. phone tones. Default:

no.

Pulse

The standard installation of Asterisk does not permit you to specify that a Zaptel device use pulse dialing,

even though the Zaptel driver supports pulse dialing. But you can apply a patch file to enable you to specify

pulse dialing with the pulse keyword. See Pulse Dialing on Zap Channels for the patch.