Interner Hilfetext zu dieser Applikation in Asterisk 1.4: 

  -= Info about application 'ChanSpy' =- 

[Synopsis]
Listen to a channel, and optionally whisper into it

[Description]
  ChanSpy([chanprefix][|options]): This application is used to listen to
 the
audio from an Asterisk channel. This includes the audio coming in and
out of the channel being spied on. If the 'chanprefix' parameter is spec
ified,
only channels beginning with this string will be spied upon.
  While spying, the following actions may be performed:
    - Dialing # cycles the volume level.
    - Dialing * will stop spying and look for another channel to spy on.
    - Dialing a series of digits followed by # builds a channel name to 
append
      to 'chanprefix'. For example, executing ChanSpy(Agent) and then di
aling
      the digits '1234#' while spying will begin spying on the channel
      'Agent/1234'.
  Options:
    b             - Only spy on channels involved in a bridged call.
    g(grp)        - Match only channels where their ${SPYGROUP} variable
 is set to
                    contain 'grp' in an optional : delimited list.
    q             - Don't play a beep when beginning to spy on a channel
, or speak the
                    selected channel name.
    r[(basename)] - Record the session to the monitor spool directory. A
n
                    optional base for the filename may be specified. The
                    default is 'chanspy'.
    v([value])    - Adjust the initial volume in the range from -4 to 4.
 A
                    negative value refers to a quieter setting.
    w             - Enable 'whisper' mode, so the spying channel can tal
k to
                    the spied-on channel.
    W             - Enable 'private whisper' mode, so the spying channel
 can
                    talk to the spied-on channel but cannot listen to th
at
                    channel.

Differenz zum internen Hilfetext in Asterisk 1.2: 

5c5,6
< Listen to a channel, and optionally whisper into it
---
> Listen to the audio of an active channel
> 
9c10
< audio from an Asterisk channel. This includes the audio coming in and
---
> audio from an active Asterisk channel. This includes the audio coming 
in and
12c13
<   While spying, the following actions may be performed:
---
>   While Spying, the following actions may be performed:
17c18
<       the digits '1234#' while spying will begin spying on the channel
---
>       the digits '1234#' while spying will begin spying on the channel
,
20,24c21,24
<     b             - Only spy on channels involved in a bridged call.
<     g(grp)        - Match only channels where their ${SPYGROUP} variab
le is set to
<                     contain 'grp' in an optional : delimited list.
<     q             - Don't play a beep when beginning to spy on a chann
el, or speak the
<                     selected channel name.
---
>     b - Only spy on channels involved in a bridged call.
>     g(grp) - Match only channels where their ${SPYGROUP} variable is s
et to
>              'grp'.
>     q - Don't play a beep when beginning to spy on a channel.
28,34c28,29
<     v([value])    - Adjust the initial volume in the range from -4 to 
4. A
<                     negative value refers to a quieter setting.
<     w             - Enable 'whisper' mode, so the spying channel can t
alk to
<                     the spied-on channel.
<     W             - Enable 'private whisper' mode, so the spying chann
el can
<                     talk to the spied-on channel but cannot listen to 
that
<                     channel.
---
>     v([value]) - Adjust the initial volume in the range from -4 to 4. 
A
>                  negative value refers to a quieter setting.