[cisco-voip] ??? incoming calls to fxo routed AttendantDN but then disconnected??

[gokhan senol]

hi 
 any idea pls, still i have big trouble with this issue.

i got ccm 4.1.3 and fxo ports connected fct's for gsm connections 
Gateway and CCM has mgcp connection. 
On callmanager fxo port configuration, I configured AttendantDN for routing incoming calls to this DN. 

what is the relation of using battery reversal command for routing the incoming calls to Attendant DN which is specifed on callmanager. 

Because if i enabled battery-reversal under fxo port(it is also enabled default), calls directed to Attendant DN but only one time phone rings and then disconnects. 

But if i use no battery-reversal command under voice-port ,calls go to the AttendantDN and call can be set up succeessfully.But this time i often face to outgoing calls busy problem. 

voice port config

voice-port 0/1/1
 timing hookflash-out 500
 description 5339203444
!

any idea 
thansk 
Gokhan


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