[PLUG] Can't call out FXS port...

[Michael C. Robinson]

No matter what I dial on phones hooked to the FXS ports, I get a busy
signal.
[root at robin ~]# dahdi_scan 
[1]
active=yes
alarms=OK
description=Wildcard TDM410P Board 1
name=WCTDM/0
manufacturer=Digium
devicetype=Wildcard TDM410P
location=PCI Bus 02 Slot 05
basechan=1
totchans=4
irq=201
type=analog
port=1,FXO
port=2,FXO
port=3,FXS
port=4,FXS
[root at robin ~]# 

My extensions.conf follows:

[global]



[external]
exten => _9NXXNXXXXXX,1,Dial(DAHDI/1/${EXTEN:1})
exten => _8NXXNXXXXXX,1,Dial(DAHDI/2/${EXTEN:1})



[my-phones]
exten => 2000,1,Dial(SIP/2000,20)
 same => 2,VoiceMail(2000,u)

exten => 2002,1,Dial(SIP/2002,20)
 same => 2,VoiceMail(2002,u)

exten => 2004,1,Dial(SIP/2004,20)
 same => 2,VoiceMail(2004,u)

exten => 2006,1,Dial(SIP/2006,20)
 same => 2,VoiceMail(2006,u)

exten => 2007,1,Dial(SIP/2007,20)
 same => 2,VoiceMail(2007,u)

exten => 2008,1,Dial(SIP/2008,20)
 same => 2,VoiceMail(2008,u)

exten => 2009,1,Dial(SIP/2009,20)
 same => 2,VoiceMail(2009,u)

exten => 2010,1,Dial(DAHDI/3)
 same => 2,VoiceMail(2010,u)

exten => 2011,1,Dial(DAHDI/4)
 same => 2,VoiceMail(2011,u)

exten => 2999,1,VoiceMailMain(${CALLERID(num)},s)

include => external

I want to be able to call the local extensions at a bare minimum.