[sunking]

Can B100P work under NT mode with bristuff? I tried many times, but there is aways not dial tone . Can anybody help me?

The following is details.
==================
software enviroment
os: centos 5.4
kernel: 2.6.18-164.el5
bristuff: bristuff-0.3.0-PRE-1y-j
zaptel: zaptel-1.2.19
asterisk: asterisk-1.2.23
x-lite
===================
Hareware enviroment
Openvox B100P
ISDN phone
===================
[root@localhost asterisk-1.2.23]# vi /etc/zaptel.conf
loadzone=us
defaultzone=us

span=1,1,3,ccs,ami
bchan=1,2
dchan=3

[root@localhost zaphfc]# vi /etc/asterisk/zapata.conf
switchtype = euroisdn
signalling = bri_net_ptmp
context=from-internal
channel => 1,2

[root@localhost asterisk]# vi sip.conf
[100]
type=friend
username=100
secret=100
host=dynamic
context=from-internal

[root@localhost asterisk]# vi extensions.conf
[from-internal]
exten => 1,1,Dial(zap/1/1)
exten => 1,2,Hangup()
exten => 2,1,Dial(sip/100)
exten => 2,2,Hangup()

==================
localhost*CLI> zap show channels
Chan Extension Context Language MusicOnHold
pseudo from-internal
1 from-internal
2 from-internal

localhost*CLI>
localhost*CLI> pri show span 1
Primary D-channel: 3
Status: Provisioned, Up, Active
Switchtype: EuroISDN
Type: Network (PtMP)
Overlap Dial: 0
T200 Timer: 1000
T203 Timer: 10000
T305 Timer: 30000
T308 Timer: 4000
T313 Timer: 4000
N200 Counter: 3

localhost*CLI>
===================
I do not know where the problem lie in. can anybody help me.
Thank you!