[cisco-nas] AS5350 ISDN Problems

[GLO]

I have a Cisco access server AS5350 with E1 modules; and I am experiencing a
strange problem.
Some dialup calls on the ISDN line connect but the users can't transmit data
(can't even ping the assigned IP).
Other users disconnect immediately after authentication.The strange thing is
that other users work just fine!
I have included my config below. Any ideas?

Regards,

GLO
--------------

version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname -------.kenyaweb.com
!
no boot startup-test
logging rate-limit console 10 except errors
no logging console
aaa new-model
aaa authentication username-prompt login:
aaa authentication login default local group radius
aaa authentication login console local line
aaa authentication ppp default if-needed local group radius
aaa authorization network default group radius
aaa accounting send stop-record authentication failure
aaa accounting nested
aaa accounting update newinfo
aaa accounting exec default start-stop group radius
aaa accounting commands 15 default start-stop group radius
aaa accounting network default start-stop group radius
aaa accounting connection default start-stop group radius
enable secret 5 000000000000000
enable password 7 00000000000000
!
username admin password 7 0000000000
!
!
resource-pool disable
syscon address 192.168.100.1 cisco
syscon shelf-id 0
!
!
!
!
voice-fastpath enable
ip subnet-zero
no ip source-route
no ip finger
ip name-server ---------------
ip name-server ---------------
!
frame-relay switching
isdn switch-type primary-net5
call rsvp-sync
modemcap entry next:MSC=AT&FS0=0S29=6S65=1024S66=1024
!
!
!
!
!
fax interface-type modem
mta receive maximum-recipients 0
!
!
!
controller E1 3/0
framing NO-CRC4
pri-group timeslots 1-31
!
controller E1 3/1
framing NO-CRC4
channel-group 1 timeslots 1-31
!
controller E1 3/2
framing NO-CRC4
pri-group timeslots 1-31
!
controller E1 3/3
!
controller E1 3/4
!
controller E1 3/5
!
controller E1 3/6
!
controller E1 3/7
framing NO-CRC4
channel-group 17 timeslots 17
channel-group 18 timeslots 18
channel-group 19 timeslots 19
!
!
interface Loopback0
no ip address
!
interface Tunnel0
ip address 213.150.98.50 255.255.255.252
tunnel source 195.202.84.182
tunnel destination 195.202.92.206
!
interface FastEthernet0/0
ip address 213.150.100.1 255.255.255.0 secondary
ip address 213.150.99.177 255.255.255.240 secondary
ip address 194.201.253.23 255.255.255.0
ip access-group 100 in
ip access-group 100 out
no ip redirects
no ip proxy-arp
no ip mroute-cache
duplex full
speed 100
no cdp enable
!
--More--
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
no cdp enable
!
interface Group-Async0
no ip address
no group-range
!
interface Group-Async1
ip unnumbered FastEthernet0/0
encapsulation ppp
no ip route-cache
no ip mroute-cache
carrier-delay 5
async mode dedicated
peer default ip address pool mypool
no fair-queue
ppp max-bad-auth 5
ppp authentication pap
group-range 1/00 2/59
!
interface Dialer1
ip unnumbered FastEthernet0/0
encapsulation ppp
dialer in-band
dialer idle-timeout 100000
dialer-group 1
peer default ip address pool mypool
no fair-queue
no cdp enable
ppp max-bad-auth 5
ppp authentication pap
!
!
ip local pool mypool 21.15.7.1 21.15.7.100
ip classless
ip route 0.0.0.0 0.0.0.0 1.2.2.1
!
dialer-list 1 protocol ip permit
!
snmp-server community Kx12 RO
!
radius-server host 21.2.2.5 auth-port 1945 acct-port 1946 non-standard
radius-server retransmit 3
radius-server timeout 60
radius-server key 7 00000000000000
radius-server vsa send accounting
radius-server vsa send authentication
!
voice-port 3/0:D
!
voice-port 3/2:D
!
!
line con 0
transport input none
line aux 0
autoselect during-login
autoselect ppp
line vty 0 4
password 7 0000000000
autoselect ppp
line vty 5 28
line 1/00 1/59
no flush-at-activation
autoselect ppp
modem Dialin
modem autoconfigure type next
autocommand ppp
transport input all
line 2/00 2/59
no flush-at-activation
autoselect ppp
modem Dialin
modem autoconfigure type next
autocommand ppp
transport input all
!
scheduler allocate 10000 400
end
----------------