[Asterisk-Users] Problem

[rizwan]

Hello

I have configured asterisk on my LAN.
When i typed the dial command, got the error like
*CLI> dial 12345 at test1
*CLI>     -- Executing NoOp("OSS/dsp", "?call for ?12345")
  == Auto fallthrough, channel 'OSS/dsp' status is 'UNKNOWN'
 << Hangup on console >>

Can you please tell me what can be the reason of :
== Auto fallthrough, channel 'OSS/dsp' status is 'UNKNOWN'

Thanks