[Asterisk-Users] extension seen as busy when it is not

[Rich Adamson]

> Every few days our receptionist's phone will not take calls on one of 
> the extensions. We have an extension 118 going to the first two lines of 
> her phone and extension 101 going to the other. If we try to dial 118 it 
> goes to voicemail even though she is not on the phone. Asterisk is 
> thinking she is not logged on or something because the message in the 
> log stays there is congestions calling that extension:
> 
>         >  dialparties.agi: extnum: 118
>         >  dialparties.agi: exthascw: 1
>         >  dialparties.agi: exthascfb: 0
>         >  dialparties.agi: extcfb:
>    dialparties.agi: Extension 118 has call waiting enabled2
>    dialparties.agi: get_dial_string: extnum=[118]
>      --  dialparties.agi: get dial string 118, SIP/118
>      --  dialparties.agi: DbSet CALLTRACE/118 to 101
>      -- AGI Script dialparties.agi completed, returning 0
>      -- Executing Dial("SIP/101-dc56", "SIP/118|25|tTwWr") in new stack
>    == Everyone is busy/congested at this time (1:0/0/1)
>      -- Executing GotoIf("SIP/101-dc56", "0?s-CHANUNAVAIL|1") in new stack
>      -- Executing GotoIf("SIP/101-dc56", "0?s-CHANUNAVAIL|1") in new stack
>      -- Executing NoOp("SIP/101-dc56", "Sending to Voicemail box 118") 
> in new stack
> 
> 
> What can I look at to see why this is happening?

I'd start by looking for registration timeout issues associated with the
sip phone. Might also check /var/log/asterisk/messages (or where ever
your log files are located) to see if there might be some indications.