CME Sip to Sip geht nicht

[kperas]

Hallo Forum, ich habe hier ein Problem: Ich habe zwei Snom300 erfolgreich an einem CME registriert. Die Telefone zeigen das an. Ich kann aber zwischen den beiden nicht anrufen.
Ich habe zwei Nebenstellen: 14 und 15. Wenn ich an der Nebenstelle 14 die 15 anwähle steht im Display "Not found: 15"

Hier ist die Config meines CMEs:

Router#sh run
Building configuration...

Current configuration : 2092 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot system flash:c2801-ipvoice_ivs-mz.124-22.YB4.bin
boot-end-marker
!
logging message-counter syslog
enable secret XXXXXXXXXXXXXXXX
!
no aaa new-model
network-clock-participate wic 2
ip source-route
!
ip cef
no ipv6 cef
multilink bundle-name authenticated
!
voice service voip
 allow-connections sip to sip
 sip
  registrar server expires max 1200 min 300

!
voice register global
 mode cme
 source-address 172.22.200.123 port 5060
 max-dn 56
 max-pool 14
 authenticate register
 time-format 24
!
voice register dn  14
 number 14
 allow watch
 name SIP14
 label 14
!
voice register dn  15
 number 15
 allow watch
 name SIP15
 label 15
!
voice register dialplan  1
!
voice register pool  1
 id mac 0004.1328.285D
 number 1 dn 14
 dtmf-relay sip-notify
 username 14 password 14
 codec g711alaw
!
voice register pool  2
 id mac 0004.132F.3EB6
 number 2 dn 15
 dtmf-relay sip-notify
 username 15 password 15
 codec g711alaw
!
!
!
voice-card 0
!
!
!
username XXXXXXXXXXXXX privilege 15 password 0 XXXXXXXXXX
archive
 log config
  hidekeys
!
!
!
!
!
!
interface FastEthernet0/0
 ip address 172.22.200.123 255.255.0.0
 duplex auto
 speed auto
!
interface Service-Engine0/1
 no ip address
 shutdown
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface BRI0/2/0
 no ip address
!
interface BRI0/2/1
 no ip address
!
interface ATM0/3/0
 no ip address
 shutdown
 no atm ilmi-keepalive
!
ip forward-protocol nd
!
!
ip http server
!
!
!
!
!
control-plane
!
!
!
voice-port 0/0/0
!
voice-port 0/0/1
!
voice-port 0/2/0
!
voice-port 0/2/1
!
ccm-manager fax protocol cisco
!
mgcp fax t38 ecm
!
!
!
!
!
gatekeeper
 shutdown
!
!
line con 0
line aux 0
line 130
 no activation-character
 no exec
 transport preferred none
 transport input all
 transport output pad telnet rlogin lapb-ta mop udptn v120
line vty 0 4
 login local
!
scheduler allocate 20000 1000
end

Weiß jemand, was da noch fehlt?