CHANNEL(Feld)Liest/setzt bestimmte Kanaldaten. Feld ist eines der
folgenden (wenn nicht anders angegeben, ist nur Lesen möglich):
audioreadformat- Das Format eingehender Audiodaten auf dem Kanal
audionativeformat- Das native Audioformat des Kanals
audiowriteformat- Das Format ausgehender Audiodaten auf dem Kanal
callgroup- In Asterisk lassen sich Extensions in Call Groups von 0 bis 63 einordnen, z. B. als Kundennummer.[216]
channeltype- Die „Technologie“ dieses Kanals, also z. B. IAX oder SIP
language- Die Sprache für Voice-Prompts. (Sie kann hier auch angegeben werden.)
musicclass- Die Musik-Klasse für Wartemusik, wie in
musiconhold.confdefiniert. (Sie kann hier auch angegeben werden.) stateZustand des Kanals (
Down,Rsrvd,OffHook,Dialing,Ring,Ringing,Up,Busy,Dialing Offhook,Pre-ring,Unknown)tonezone- Die „Tone zone“ bestimmt die Ton-Signale
(Wählen, Klingeln, Besetzt, ...) für bestimmte Länder. Sie wird in
der Konfigurationsdatei des Kanals (z. B.
zaptel.conf) durchloadzoneunddefaultzonefestgelegt. Die möglichen Werte sind (wie in derindications.confdefiniert):at,au,be,br,ch,cl,cn,cz,de,dk,ee,es,fi,fr,gr,hu,it,lt,mx,ml,no,nz,pl,pt,ru,se,sg,uk,us,us-old,tw,ve,za. videonativeformat- Das native Videoformat dieses Kanals
Zusätzlich zu diesen Feldern kann der Treiber des Kanals noch weitere bereitstellen, die man in der entsprechenden Dokumentation nachschlagen kann. Felder, die auf dem aktuellen Kanal nicht zur Verfügung stehen, geben einen leeren String zurück.
; Typ des Kanals abfragen:
exten => 123,1,Set(foo=${CHANNEL(channeltype)})
; Sprache auf Englisch setzen:
exten => 123,1,Set(CHANNEL(language)=en)Asterisk-Versionen:
| | | 1.4 |————————| 1.6 |————————
Interner Hilfetext zu dieser Funktion in Asterisk 1.4:
-= Info about function 'CHANNEL' =-
[Syntax]
CHANNEL(item)
[Synopsis]
Gets/sets various pieces of information about the channel.
[Description]
Gets/set various pieces of information about the channel.
Standard items (provided by all channel technologies) are:
R/O audioreadformat format currently being read
R/O audionativeformat format used natively for audio
R/O audiowriteformat format currently being written
R/W callgroup call groups for call pickup
R/O channeltype technology used for channel
R/W language language for sounds played
R/W musicclass class (from musiconhold.conf) for hold music
R/W rxgain set rxgain level on channel drivers that support it
R/O state state for channel
R/W tonezone zone for indications played
R/W txgain set txgain level on channel drivers that support it
R/O videonativeformat format used natively for video
chan_sip provides the following additional options:
R/O rtpqos Get QOS information about the RTP stream
This option takes two additional arguments:
Argument 1:
audio Get data about the audio stream
video Get data about the video stream
Argument 2:
local_ssrc Local SSRC (stream ID)
local_lostpackets Local lost packets
local_jitter Local calculated jitter
local_count Number of received packets
remote_ssrc Remote SSRC (stream ID)
remote_lostpackets Remote lost packets
remote_jitter Remote reported jitter
remote_count Number of transmitted packets
rtt Round trip time
all All statistics (in a form suited to logging, but not for parsing)
Additional items may be available from the channel driver providing
the channel; see its documentation for details.
Any item requested that is not available on the current channel will
return an empty string.Differenz des internen Hilfetexts von Asterisk 1.2 zu 1.4: — in Asterisk 1.2 nicht vorhanden —
Differenz des internen Hilfetexts von Asterisk 1.4 zu 1.6:
--- in Asterisk 1.4
+++ in Asterisk 1.6
@@ -16,6 +16,7 @@
R/O channeltype technology used for channel
R/W language language for sounds played
R/W musicclass class (from musiconhold.conf) for hold music
+ R/W parkinglot parkinglot for parking
R/W rxgain set rxgain level on channel drivers that support it
R/O state state for channel
R/W tonezone zone for indications played
@@ -23,22 +24,52 @@
R/O videonativeformat format used natively for video
chan_sip provides the following additional options:
+ R/O peerip Get the IP address of the peer
+ R/O recvip Get the source IP address of the peer
+ R/O from Get the URI from the From: header
+ R/O uri Get the URI from the Contact: header
+ R/O useragent Get the useragent
+ R/O peername Get the name of the peer
+ R/O t38passthrough 1 if T38 is offered or enabled in this channel, otherwise 0
R/O rtpqos Get QOS information about the RTP stream
This option takes two additional arguments:
Argument 1:
audio Get data about the audio stream
video Get data about the video stream
+ text Get data about the text stream
Argument 2:
local_ssrc Local SSRC (stream ID)
local_lostpackets Local lost packets
local_jitter Local calculated jitter
+ local_maxjitter Local calculated jitter (maximum)
+ local_minjitter Local calculated jitter (minimum)
+ local_normdevjitter Local calculated jitter (normal deviation)
+ local_stdevjitter Local calculated jitter (standard deviation)
local_count Number of received packets
remote_ssrc Remote SSRC (stream ID)
remote_lostpackets Remote lost packets
remote_jitter Remote reported jitter
+ remote_maxjitter Remote calculated jitter (maximum)
+ remote_minjitter Remote calculated jitter (minimum)
+ remote_normdevjitter Remote calculated jitter (normal deviation)
+ remote_stdevjitter Remote calculated jitter (standard deviation)
remote_count Number of transmitted packets
rtt Round trip time
+ maxrtt Round trip time (maximum)
+ minrtt Round trip time (minimum)
+ normdevrtt Round trip time (normal deviation)
+ stdevrtt Round trip time (standard deviation)
all All statistics (in a form suited to logging, but not for parsing)
+ R/O rtpdest Get remote RTP destination information
+ This option takes one additional argument:
+ Argument 1:
+ audio Get audio destination
+ video Get video destination
+
+ chan_iax2 provides the following additional options:
+ R/W osptoken Get or set the OSP token information for a call
+ R/O peerip Get the peer's ip address
+ R/O peername Get the peer's username
Additional items may be available from the channel driver providing
the channel; see its documentation for details.[216] Diese Beschränkung auf 64 Gruppen scheint rein willkürlich zu sein und dürfte für den ein oder anderen Anwender nicht ausreichen.
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