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Re: Voice-Chat

Salve Julian,

Am Freitag, 3. Oktober 2003 18:22 schrieb Julian Hüper:
> Hallo Liste,
> kann mir jemand sagen ob es Programme für Voice-Chat unter Linux gibt?
> Am besten wäre es, wenn das Programm alle Möglichen Netzwerke unterstützen
> würde...

Ein Freund beschäftigt sich z.Z. mit diesem Thema und daher habe ich zwei 
Tipps: Teamspeak und Asterisk. 

AFAIK stehen beide nicht unter GPL, so das ich gerne alternativen hören würde.

Immerhin scheint asterisk den source zu liefern.


TeamSpeak is an application which allows its users to talk to each other over 
the internet and basically was designed to run in the background of online 
games. The voice quality and hereby the bandwidth usage is configurable and 
can be low for modem users or as good as normal phone calls for better 
connections. Still the client's maximum bandwidth won't exceed 25.9 KBit/s 
(=3.3 KB/s) upstream.
 Also TeamSpeak uses as little latency as possible, which makes TeamSpeak one 
of the best online gaming communication programs.
But one of TeamSpeak's largest advantages is: TeamSpeak is a cross-platform 
voice communication tool. This means that client and server are available for 
Windows as well as for Linux. It doesn't matter which operating system you 
use any longer, you can talk "across the border". And yes, special greetings 
to the large MAC community, a MAC version of TeamSpeak is planned already.
Additionally we have to say that TeamSpeak is a contribution to the gaming 
community and thus it is completely free for non-commercial users. Commercial 
users, defined as anyone who uses TeamSpeak as company or to earn money (see 
the license agreement for the exact definition), need to pay a small fee to 
TeamSpeak. Read the [link]license agreement[/link] for deta

Asterisk is a complete PBX in software. It runs on Linux and provides all of 
the features you would expect from a PBX and more. Asterisk does voice over 
IP in three protocols, and can interoperate with almost all standards-based 
telephony equipment using relatively inexpensive hardware.

Asterisk provides Voicemail services with Directory, Call Conferencing, 
Interactive Voice Response, Call Queuing. It has support for three-way 
calling, caller ID services, ADSI, SIP and H.323 (as both client and 
gateway). Check the Features section for a more complete list.

Asterisk needs no additional hardware for Voice over IP.  For interconnection 
with digital and analog telephony equipment, Asterisk supports a number of 
hardware devices, most notably all of the hardware manufactured by Asterisk's 
sponsors, Digium. Digium has single and quad span T1 and E1 interfaces for 
interconnection to PRI lines and channel banks.  In addition, an analog FXO 
card is available, and more analog interfaces are in the works.

Also supported are the Internet Line Jack and Internet Phone Jack products 
from Quicknet.

Asterisk supports a wide range of TDM protocols for the handling and 
transmission of voice over traditional telephony interfaces. Asterisk 
supports US and European standard signalling types used in standard business 
phone systems, allowing it to bridge between next generation voice-data 
integrated networks and existing infrastructure. Asterisk not only supports 
traditional phone equipment, it enhances them with additional capabilities.

Using the IAX Voice over IP protocol, Asterisk merges voice and data traffic 
seamlessly across disparate networks. While using Packet Voice, it is 
possible to send data such as URL information and images in-line with voice 
traffic, allowing advanced integration of information.

Asterisk provides a central switching core, with four APIs for modular loading 
of telephony applications, hardware interfaces, file format handling, and 
codecs. It allows for transparent switching between all supported interfaces, 
allowing it to tie together a diverse mixture of telephony systems into a 
single switching network.

Asterisk is primarily developed on GNU/Linux for x/86. It is known to compile 
and run on GNU/Linux for PPC. Other platforms and standards based UNIX-like 
operating systems should be reasonably easy to port for anyone with the time 
and requisite skill to do so. Asterisk is available in the testing and 
unstable Debian archives, maintained thanks to Mark Purcell.

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