[asterisk-users] Noises on Batphones

[Doug Bailey]

----- "Jason Martin" <jmartin at metrixmatrix.com> wrote:

> Hello,
> 
> The company I work for recently purchased 2 Rhino CB24s and a Rhino  
> PCI-E R4T1. The channel banks are plugged into the R4T1, as well as 2 
> 
> PRIs from our telco. The CB24s are for all internal analog phones.  
> Most of the phones are setup in "batphone mode", which is  
> "immediate=on" in the DAHDI config. They are set up this way because 
> 
> we are an outgoing call center, and the context that the batphones go 
> 
> to a database table to pull the phone number they are calling.
> 
> Along with this new hardware, we changed to a new "server" (just a  
> Dell E520 workstation with 4 gigs of RAM and 2 250 gig SATA drives  
> software RAIDed) with the following software:
> 
> Ubuntu 9.04
> Asterisk 1.6.1.4
> Asterisk-addons 1.6.1.1 (for the cdr-mysql plugin)
> dahdi-linux-complete 2.2.0.2 + 2.2.0
> libpri 1.4.10.1
> rhino drivers 0.99.2
> 
> Since day one, all batphones have had a weird noise at the very  
> beginning of the call. I contacted Rhino about it and the support tech
>  
> told me that it's "fsk" tones that have caller ID and MWI information 
> 
> and advised me to turn off advanced features like mailboxes. The  
> phones already didn't have mailboxes, but I put in "mwisendtype=nofsk"
>  
> in chan_dahdi.conf anyway, and all features like faxdetect and  
> transfer are turned off.
> 

If the fsk spill that you hear is at the beginning of the call, it is due 
to the transmission of CID information.  (This is usually transmitted 
between the first and second rings.) 

You should be able to set usecallerid=no in chan_dahdi.conf to disable 
the sending of the caller id fsk spill. 

Regards
Doug Bailey