misdn.conf

This information refers to chan_misdn as of 2005-06-27, which is outdated.

This page describes the configuration directives available for chan_misdn (see also Asterisk mISDN channels). The information in this page have been leaned by reading the source, therefore it is incomplete and it might be incorrect. I’ll extend/correct it as I go along. This page is work in progress.

As many other configuration files there is a general section, and one section for each port. A port is basically one ISDN line with two B-channels.

General-section

 

ports

What’s this doing here?

context

Default context to use for incoming calls

use_callingpres

Whether or not to use CallerID-presentation values provided by Asterisk. If set to true the presentation-value by Asterisk will take precendence. If set to false only the presentation option is examined.

l1_info_ok

When set to true layer-1 information will be distrusted

presentation

If set to allowed the CallerID will be sent (`presented’); if set to not_screened the CallerID is not sent/displayed.

dialplan

Sets the `dialplan’:

• • 0 == Unknown
  • 1 == International
  • 2 == National
  • 3 == Subscriber

nationalprefix

Prefix for national (i.e. non-local) calls. In Germany this is 0.

internationalprefix

Prefix for international calls. In Germany this is 00.

language

Language of the ports. This is passed to Asterisk only. The ISDN channels never get in touch with this. Apparently a two-letter abbrevation is expected, such as en for english or de for german.

early_bconnect

Connects to the B-channel when retrieving an PROCEEDING or ALERTING event.

rxgain

Gain of received audio stream. This is a number between -8 and 8.

txgain

Gain of transmitted audio stream. This is a number between -8 and 8.

bridging

When set to true calls between different ISDN ports will be bridged in hardware. This requires mISDN_dsp.

te_choose_channel

Has something to do with which channel is being used.. I hear one should set it to yes when experiencing one-way calls. No clue as to why though..

msns

Calls whose destination is equal to this will be ignored. This doesn’t make sense to me and I suspect this is a relict from an earlier version..

debug

Debug level. Reasonable values are 0 through 4, but 1 should be okay for most mortal souls..

dynamic_crypting

not implemented?

crypt_keys

Comma seperated list of encryption keys, I think.

stop_tone_after_first_digit

Stop the dial-tone after the first digit has been received.

append_digits2exten

Wether to append overlapdialed Digits to Extension or not. What does this mean?

tracefile

Debugging output will be written to this file, even when the CLI is active.

 

Per-port-sections

 

ports

Ports that belong to this port-group. The assigned numbers depend on the (kernel)module loading order and/or /etc/misdn-init.conf.

context

Context for incoming calls on this ports.

diaplan

See `dialplan’ in the general section. Yes, it’s really diaplan without the first `l’. This is a typo in the channel module.. The general-section gets it right though..

nationalprefix

See above.

internationalprefix

See above.

language

See above.

presentation

See above.

rxgain

See above.

txgain

See above.

msns

Comma seperated list of MSN (Multiple Subscriber Numbering) numbers.

immediate

If a call is signaled (a SETUP request) without transmitting which extension (MSN) is to be called then Asterisk will immediately start with the s extension. If this option is false Asterisk will likely not match any extension and disconnect in this case.

always_immediate

Always start with the s extension, even if a MSN was transmitted.

hold_allowed

Defines if it is possible to put a call on hold on this port, or this group of ports. A call forwarded over, e.g., an IAX line may still put the call on hold, but the user on the ISDN line cannot.

callerid

The MSN that should be sent as CallerID. In contrast to the rest of Asterisk this value is not in the form “”Name” <Number>” but only the plain number, nothing else.

callgroup (Asterisk 1.2.x)

Used for pick-up groups or something..

pickupgroup (Asterisk 1.2.x)

Used for pick-up groups or something..