VOIP

fwd numbers

me 275052
steve 754819
dean 257532
agi 823170

• Asterisk conference http://Astricon.net/
• Internet VOIP conference http://www.tmcnet.com/voip/conference/

I currently use Packet8 service at home, have for a couple years now. It works fine but I am now diving in deeper.

I am also building a system for a small business, which will probably use Linksys equipment.

I am playing with softphones now.

pulver communicator (from fwd site) (Windows)

ekiga (for Linux) could not get it going because the linux box has no mic input! (A Shuttle SB95)

Adore softphone (Windows)

Hardware

PSTN gateways

I tried out a Linksys SPA-400 with 3 PSTN analog phone lines and an Asterisk server running on a recycled PC. It probably works fine as intended, in an all Linksys system but I was never able to get it to work reliably with Asterisk. The irony is that the SPA-400 runs Linux and Asterisk internally.

You can download the source tarball from the Linksys site.

version 1.0.0.2

It's based on Monta Vista Hardhat Linux

• MIPS processor
• ?? Flash
• ?? RAM
• Linux 2.4 kernel
• Busybox
• Asterisk PBX software
• thttpd
• /usr/sbin/lightbox controls LED's
• dropbear ssh

After a few months of wrestling with it, we bought a TDM-400 and sold the SPA-400 on eBay.

Digium X100P

These are fine if you only need one line, cheap on ebay.

Digium TDM400

This is the card I am working with now.

Sipura SPA3000

I'd like to try one of these as a single line solution.

Asterisk

You might want to use an IDE/CF adapter that can hold two CF cards. This way you could stick in a smaller second card -say- 32 or 64MB and mount stuff like /etc/asterisk, /var/log, /var/run and voicemail etc on that one, possibly leaving the main card mounted read-only for most of the time.

http://www.limeylinux.org/

The Linksys SPA-400 uses flash on board for the operating system and then mounts /var on a USB stick. It sticks out way too far but that's another story.

Using Digium cards for FXS/FXO

Zaptel modules

Use the command genzaptelconf -d to generate new config files. Generates /etc/zaptel.conf and /etc/asterisk/zapata-channels.conf files.

Echo cancellation and gain settings on FXO lines

This page covers both of these topics:http://www.asteriskdocs.org/modules/tinycontent/content/docbook/current/docs-html/x1695.html

This one is interesting too: http://www.rowetel.com/blog/?p=18

1. Edit /etc/zaptel.conf to adjust receive and xmit gain levels.
2. Use ztmonitor channel to see levels during a call.
3. Use asterisk -r and the reload command to change settings during a call.

Web interface

Voicemail

User interface

On delete of message, move it to Trash/

Administration interface

• Should trashed messages be deleted or archived? How often?
• Should messages marked as old be deleted or archived? How often?
• Per user control of Trash/ ?

Links

Asterisk

Free World Dialup

Digital signal processing and Spandsp: http://www.soft-switch.org/

The Blackfin project http://rowetel.com/ucasterisk/