asterisk users - Nov 2003 - Dialing 800 numbers through FWD or SIPphone?

Hi,

Does anyone know how to dial toll-free (800) numbers through FWD or Siphone?

Using the configuration below, I can dial out to SIPphone.com users by
simply 
dialing their number (1747XXXXXXX) and can dial out to FWD users by dialing
1383<FWD#>

However, when I dial 18005551212 through SIPphone, or through FWD (depending
upon which line is selected in "; 800 Toll Free Numbers" below, I
receive
a "403 Forbidden" response.  From what I've read, this might be
due to
outbound proxy authentication with FWD, but I don't believe that
SIPphone.com
is using proxy authentication.  I can configure the phones to connect
directly
to both FWD and SIPphone.com and they work when dialing the 800 numbers.

Any suggestions would be greatly appreciated.

Barton

---

sip.conf:

[fwd]
type=friend
username=FWD#
secret=secret
host=fwd.pulver.com

[sipphone]
type=friend
username=SIPPHONE#
secret=secret
host=proxy01.sipphone.com
fromuser=SIPPHONE#
fromdomain=proxy01.sipphone.com


extensions.conf: 

; 800 Toll Free Numbers
exten => _1800XXXXXXX,1,SetCallerID(${CALLERIDNUM})
exten => _1800XXXXXXX,2,SetCIDName(${CALLERIDNUM})
exten => _1800XXXXXXX,3,Dial(SIP/${EXTEN}@sipphone)
;exten => _1800XXXXXXX,3,Dial(SIP/*${EXTEN}@fwd)
exten => _1800XXXXXXX,4,Hangup

; SIPphone.com
exten => _1747XXXXXXX,1,SetCallerID(${CALLERIDNUM})
exten => _1747XXXXXXX,2,SetCIDName(${CALLERIDNUM})
exten => _1747XXXXXXX,3,Dial(SIP/${EXTEN}@sipphone)
exten => _1747XXXXXXX,4,Hangup

; Free world dialup
exten => _1393.,1,SetCallerID(${CALLERIDNUM})
exten => _1393.,2,SetCIDName(${CALLERIDNUM})
exten => _1393.,3,Dial(SIP/${EXTEN:4}@fwd)
exten => _1393.,4,Hangup

You need to add "#" before dialing the rest of numbers.

Ta
SJ