asterisk users - Dec 2004 - BT100 cannot park a call properly???

bt100 1.0.5.18 (same results with previous versions)

an outside call comes in via fxo to an extension hosted
by a sipura 2k. the call is parked and is able to be
picked up (un parked) on a second extension hosted on
a completely different xipura 2k. the call is then reparked
and an attempt is made to answer with a bt100. the call is
retrieved (un parked) but any further attempts to park
from the bt100 fail and just hang up the caller.

an outside call comes in to an extension using a bt100.
an attempt is made to park the call, the attendant says
701. hanging up the phone disconnects the caller.

the dial command is as such:
exten =>
40852,8,Dial(SIP/${Ext}&SIP/${Ext2}&SIP/${Ext3}&SIP/${Ext4},15,tTr)

${Ext} is the bt100

the bt100 is set to INFO and the sip.conf is set to inband (was set to info
with the same results)

The parking has to be done by flashing the hook, the flash conference
and transfer buttons do not work as I would think they would.

anybody have a similar issue.

extensions.conf

[40852]
exten => 40852,1,SetVar(Ext=40852)
exten => 40852,2,SetVar(Ext3=40853)
exten => 40852,3,SetVar(Ext4=40854)
exten => 40852,4,SetVar(Ext2=40855)
exten => 40852,5,SetVar(ALERT_INFO=Bellcore-r2)
exten => 40852,6,SetMusicOnHold,homeline
exten => 40852,7,NoOp
exten =>
40852,8,Dial(SIP/${Ext}&SIP/${Ext2}&SIP/${Ext3}&SIP/${Ext4},15,tTr)
exten => 40852,9,goto(s-${DIALSTATUS},1 )
; go here for no anwer
exten => s-NOANSWER,1,Goto(s-${DIALSTATUS},2)
exten => s-NOANSWER,2,Background(silence/1)
exten => s-NOANSWER,3,Background(chickensmonkeys)
exten => s-NOANSWER,4,Goto(s-${DIALSTATUS},5)
exten => s-NOANSWER,5,Voicemail(${Ext})
exten => s-NOANSWER,6,Goto(${${Ext}.9)
;go here for a busy line
exten => s-BUSY,1,Goto(s-BUSY,2)
exten => s-BUSY,2,Background(silence/1)
exten => s-BUSY,3,Background(chickensmonkeys)
exten => s-BUSY,4,Goto(s-BUSY,5)
exten => s-BUSY,5,Voicemail(${Ext})
exten => s-BUSY,6,Goto(${Ext},9)
;done
exten => 40852,9,Hangup
;this line has access to the following
;outbound access
include => local-trunks
include => toll-free
include => toll-access
include => parkedcalls
include => default

sip.conf

[40852]
type=friend
context=40852
username=40852
fromuser=40852
callerid=BT100 <40852>
secret=secret
host=dynamic
musicclass=line1
mailbox=40852@default; set to extension so vmail indicator works
canreinvite=no
nat=no
qualify=no
dtmfmode=inband; inband for grandstream and sipura, otherwise problems 
arise with IVRs requiring DMTF tones, such as voicemail


features.conf

[general]
parkext => 700                  ; What ext. to dial to park
parkpos => 701-720              ; What extensions to park calls on
context => parkedcalls          ; Which context parked calls are in
parkingtime => 60               ; Number of seconds a call can be parked for
                                 ; (default is 45 seconds)
pickupexten = *8                ; Configure the pickup extension.  Default 
is *8



Regards
Greg Cirino