[Asterisk-Users] Polycom 500 IP and problems with show hints

[Kib Eki]

Hi,

why does asterisk always give the state Unabailable?

asterisk-er*CLI>
     -= Registered Asterisk Dial Plan Hints =-
    31                  : SIP/31exten => 31     State:Unavailable     Watchers  0
    23                  : SIP/23exten => 23     State:Unavailable     Watchers  0
    22                  : SIP/22exten => 22     State:Unavailable     Watchers  0
    21                  : SIP/21exten => 21     State:Unavailable     Watchers  0
----------------
- 4 hints registered
asterisk-er*CLI>

The phones register with only one SIP-extension. We use SIP Version 1.5.3 for 
the phones.

Part from my extension.conf:
exten => 21,hint,SIP/21
exten => 21,1,Macro(stdexten,21,SIP/21,${CALLERIDNUM},${CIDNAME})


Thanks for any help!

Regards,
BK