CNET Hacks

by Russ Price
Last Updated: 2009-06-18

This page provides hacks for Asterisk that may be useful to members of CNET, the Telephone Collector's Net.

Downloads Page

Full Tarballs

As of July 25, 2007, full tarballs of the modified source are now available, so you don't need to futz with patch files.

asterisk-cnet tarball

Current Version: 1.2.33-cnet
NOTE: This version should be used with the zaptel-cnet package below, due to the secondary dial tone addition. If it is compiled against vanilla zaptel, the extra features will not be available.

Features:

adds a configurable option to make dial or DTMF pulsing audible to the caller; it works in conjunction with the Zaptel patch below. This is directly based on Max Parke's Asterisk and Zaptel patches, but it is configurable per channel, and it does not have his SF signalling additions.
Provides a distinctive secondary dial tone if you use ignorepat in the extensions.conf file, and you're using the us, xm, or xp tone zones.

Download: asterisk-1.2.33-cnet.tar.gz

zaptel-cnet tarball

NOTE: I do not recommend 1.2.20 or 1.2.20.1 due to echo canceller problems. They are available on the downloads page if you want them.
Also, 1.2.19 will work with the OSLEC echo canceller, while 1.2.20 and 1.2.20.1 have caused kernel panics with OSLEC on my system. To use OSLEC, follow the instructions on the OSLEC site.

Latest Version: 1.2.27-cnet (on Downloads page)
Download: zaptel-1.2.27-cnet.tar.gz

This is a modified version of Digium's Zaptel device drivers for telephony interfaces; especially, the wctdm driver for the TDM400P analog telephone interface card. It provides the following features:

the ability to force the TDM400P FXS ports to provide ring current at a specific frequency
improved pulse dialing on TDM400P FXS ports
two additional call progress tone sets, usable on any FXS port
an ignoreflash keyword that may be used in your /etc/zaptel.conf file to cause FXO ports to ignore a remote hookflash
dial pulse mappings for New Zealand (or Oslo, Norway), and Sweden
FXO pulse dial pause fix - "W" in dial strings will pause even if the FXO is set for pulse dialing
audible pulsing option; requires the modified Asterisk in addition to the modified Zaptel

Quick Install:

Download the tarballs from this site, and untar them into a suitable location such as /usr/src.
```
cd /usr/src/zaptel-1.2.x-cnet
```
```
make
```
```
make install
```
```
cd /usr/src/asterisk-1.2.x-cnet
```
```
make
```
```
make install
```

Making use of the features:

Ignore hookflash: If your TDM400P has FXO ports on channels 1 and 2, and FXS ports on 3 and 4, you could tell the FXOs to ignore a remote hookflash as follows:

fxsks=1-2
ignoreflash=1-2
fxoks=3-4
# use my PBX tones instead of standard tones on the FXS ports
loadzone=xp
defaultzone=xp

Dial pulse mapping: If you have rotary-dial phones with NZ/Oslo or Swedish dial arrangements, you can set FXS channels like so:

pulse_nz_oslo=8
pulse_sweden=17-18

Note that dial pulse mapping will work on T1/E1 channels as well as on TDM400P cards. The ignoreflash keyword will also work.

UPDATE 2-27-07: Dial pulse mapping now works for FXO ports as well as FXS. Use the same syntax above.

(3-31-07) WARNING: Pulse dialing on T1 channel bank FXO ports may or may not work for you! I've noticed that the pulses from an FXO on an Adtran 750 channel bank are rather irregular-sounding, and also sound like they have an improper break/make ratio. If you need to pulse dial into a step switch, I suggest using either a TDM400P or X100P card!

Pause fix for FXO pulse dialing: Just use a "w" in the dial string, just like you would for DTMF.

Audible pulsing: If you want callers to hear your Asterisk box pulsing into your step switch, you will need to apply the patch to Asterisk (chan_zap.c) as well as the patch to Zaptel. You will then need to activate audible pulsing on the channels where you want it in both /etc/zaptel.conf and /etc/asterisk/zapata.conf for this to work.

/etc/zapel.conf:

hearpulsing=2-3

/etc/asterisk/zapata.conf:

; be sure to apply other settings to these channels
hearpulsing=yes
channel => 2
channel => 3

FXS port ring frequency: set when loading the wctdm module. The command line passed to modprobe would take the form:

modprobe wctdm opermode=FCC30 fxshonormode=1 boostringer=1

Modes available are:

FCC17 (16.67 Hz)
FCC25 (25 Hz)
FCC30 (30 Hz)
FCC33 (33.33 Hz)
FCC40 (40 Hz)
FCC42 (42 Hz)
FCC50 (50 Hz)
FCC54 (54 Hz)
FCC60 (60 Hz)
FCC67 (66.66 Hz)

The standard FCC mode is 20 Hz.

NOTE: Changing the opermode parameter affects all FXS ports on the card. This may change in a future release.

app_rpsim

This is a little application that may be installed into Asterisk to provide simulated panel revertive pulsing sounds to a caller. It expects a four-digit extension number.

Download the application sources.
Untar the tarball and change to its directory.
```
make && make install
```
Restart Asterisk.

In your extensions.conf file, you could set up an sample extension as follows:

exten => 1234,1,RPSim(${EXTEN})
exten => 1234,n,Progress
exten => 1234,n,Ringing
exten => 1234,n,Wait(10)
exten => 1234,n,Answer
exten => 1234,n,Playback(tt-weasels)
exten => 1234,n,Hangup

Credit goes to Evan Doorbell's Panel Pulsing Lover's Tape, available on the Phone Trips site, which inspired this application and provided the pulse sounds.