On Thursday 23 September 2004 18:04, Norbert Tretkowski wrote:
> * Martin Steigerwald wrote:
> > Gibt es ein ISDN-Telefon mit Anrufbeantworter, das sich von einer
> > Software von Linux aus steuern läßt?
>
> ISDN Karte in Rechner, Asterisk installieren, und IP Telefon dran
> stoepseln.
>
> Ja, ist etwas teurer. Macht aber Spass. :-}
>
Wenn's nicht so teuer sein soll, und auch noch als Anrufbeantworter und ISDN
Vermittlung dienen soll, dann vielleicht auch:
PBX4Linux
http://isdn.jolly.de/
PBX4Linux general features:
* DSS1 signalling system (Euro ISDN) as specified in ITU Q.931 (mISDN)
* using cheap ISDN cards to connect internal telephones
* IP telephonie using Voice-over-IP as specified in ITU H.323 (OpenH323)
* encryption of external calls using RSA key-exchange or preshared keying
* multiple external lines of mixed type (point-to-point or
point-to-multipoint)
* multiple internal ports (real point-to-multipoint)
* external calls
* internal calls
* calls via Voice-over-IP
* VoIP<->ISDN gateway
* integrated individual voice box with menu
* capable of conferrences with unlimited number of parties
* real-time audio processing for minimum audio delay (using a special
kernel module "mISDN_dsp.o")
* German and English tones and texts
* streaming or playing preloaded tones
* real time scheduling and prohibition of swapping for better performance
* DTMF decoding
* directory of numbers and their names
* test mode
* playback of audio LAW/wave files (for announcements)
* external login to extension (retrieve message from answering machines,
dial through, change diversion)
* callback
* pocket calculator
* detailled debug log capability
Features for each telephone 'extension':
* caller ID (CLIP/COLP)
* caller name (CNIP/CONP)
* caller ID restriction (CLIR/COLR)
* caller ID restriction on request (CLIRREQ/COLRREQ)
* caller ID restriction ignore (CLIRIGN/COLRIGN)
* forwaring and forwarded-to ID (redirecting/redirection number)
* dialing any number/prefix after pick-up (direct external dialing,
emegerncy phones)
* mutiple ports that will ring simultaniousely on incomming calls
* direct call forward (CFU)
* call forward when busy (CFB)
* call forward when no response after given seconds (CFNR)
* ringing with parallel forwarding (CFP)
* All forwarding can be done to multiple numbers that all ring
simultaniousely.
* forwarding of caller IDs using "CLIP no screening"
* hiding of the forwarded caller
* hiding of the forwarded-to number
* ignore anonymous calls; Only works if your telephone company provides
anonymous numbers to you
* restricted dialing with different levels: no calls, only internal calls,
local calls, national calls, international calls
* delete option to delete digits when dialing external numbers (using '*'
and '#' keys)
* using telephones display to show numbers, names, functions, states, ...
* adjust audio level
* adjust timeouts for different call states
* use own generated tones rather than external tones for different call
states
* show faked caller IDs (unscreened)
* menu to easily select all dialing codes (using '*', '#' and '0' keys)
* individual tones/patterns for each extension
* recording of calls as LAW or wave file
* log of all incomming and outgoing calls
* individual phonebook
* redial with a large history of numbers
* reply incomming calls with large history of numbers
* powerdialing of busy/disturbed numbers until reachable again.
* change caller id of next call / all calls
* change forwarding destinations
* active/inactive notification during conference
* pick-up a call that rings on a different phone (even when transferred to
voice box)
Voice box features
* recording wave files with different bit widths
* email announcement of received calls
* email with attached audio files of recordings
* answring a call that is already transferred to the voice box (pick-up)
* play back of recordings from anywhere
* limit of recording time
* recoding during announcement (pretending of answering a call, to get the
name of anonymous callers)
External line features:
* sending any subscriber number, national number or international number
without beeing checked by the telephone company. (The special feature
"CLIP/COLP no screening" must be subscribed.)
* sending tones/patterns to external calls prior answer of call (The
special facility must be subscribed.)
* processing of anonymous external calls with caller ID (The special
feature must be subscribe, but is only available to privileged subscribers.)
* availablility check for external pbx lines, to block individual lines if
they are disturbed.
* make and answer data calls as they would be audio calls
H.323 features:
* connect an incomming H.323 call prior answer (ringing tone will be
available to caller)
* different audio codecs
* gatekeeper register option
* dialing of IP numbers via telephone keypad
Siehe auch c't 9/2004 S.100: Tux vermittelt
Gruß,
Andreas
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