[Aaug] Tweaking on Sipura

[Christopher Fowler]

I've got a 2.4GHZ cordless phone plugged into my Sipura-2000.  For some
strange reason Asterisk can not "hear" me enter 0000 when I try to enter
my VM password.  From the X-lite phone it works fine

>From Sipura:
   -- Incorrect password '' for user '301' (context = default)

>From X-Lite:
  -- Incorrect password '000008' for user '301' (context = default)

I also notice that when I dial '0' and try to dial 9

[internal]
include => outbound-local
include => outbound-long-distance

exten => 0,1,Answer() exten => 0,n,Background(intro)

exten => 9,1,Answer()
exten => 9,n,Directory(default,internal)

exten => i,1,Playback(invalid)
exten => i,n,Goto(internal,0,1)
exten => t,1,Goto(internal,0,1)

It seems the system hears nothing.  It just times out and plays intro
again.  I just tried a new phone and got same effect.