Patton 4634 langes warten auf Freizeichen bei ausgehenden Anruf

172.22.141.9#show running-config 
#----------------------------------------------------------------#
#                                                                #
# SN4634/3BIS/UI                                                 #
# R5.2 2008-11-14 H323 SIP BRI                                   #
# 1970-01-01T04:03:11                                            #
# SN/00A0BA029DF5                                                #
# Generated configuration file                                   #
#                                                                #
#----------------------------------------------------------------#

cli version 3.20
administrator net4you password +EL6lfpgXjQrU+OvlbOdoA== encrypted
clock local offset +01:00
dns-client server 194.177.128.113
dns-client server 194.177.151.10
dns-relay
webserver port 80 language en
sntp-client
sntp-client server primary 194.177.128.113 port 123 version 4
sntp-client server secondary 194.177.151.10 port 123 version 4

system

  ic voice 0
    low-bitrate-codec g729

system
  clock-source 1 bri 0 0
  clock-source 2 bri 0 1
  clock-source 3 bri 0 2

profile napt NAPT_WAN

profile ppp default

profile tone-set default

profile voip default
  codec 1 g711alaw64k rx-length 20 tx-length 20
  codec 2 g711ulaw64k rx-length 20 tx-length 20

profile pstn default

profile sip default

profile aaa default
  method 1 local
  method 2 none

context ip router

  interface WAN
    ipaddress dhcp
    use profile napt NAPT_WAN
    tcp adjust-mss rx mtu
    tcp adjust-mss tx mtu

  interface LAN
    ipaddress 172.22.141.9 255.255.255.0
    no napt-inside
    tcp adjust-mss rx mtu
    tcp adjust-mss tx mtu

context ip router
  route 0.0.0.0 0.0.0.0 172.22.141.5 0

context cs switch
  national-prefix 0
  international-prefix 00

  routing-table called-e164 RT_ISDN_1_2_TO_SIP_VOICEBOX
    route T dest-table ISDN2SIP MT_ADD_0

  routing-table called-e164 ISDN2SIP
    route .T dest-interface HG_ISDN_1_2_TO_SIP_VOICEBOX

  mapping-table called-e164 to called-e164 MT_ADD_0
    map $ to 0

  interface isdn IF_ISDN_0
  interface isdn IF_ISDN_1
    route call dest-table RT_ISDN_1_2_TO_SIP_VOICEBOX

  interface isdn IF_ISDN_2
    route call dest-table RT_ISDN_1_2_TO_SIP_VOICEBOX

  interface sip IF_SIP_VOICEBOX
    bind context sip-gateway voicebox
    route call dest-service HG_SIP_VOICEBOX_TO_ISDN_1_2
    remote 172.22.141.8

  service hunt-group HG_ISDN_1_2_TO_SIP_VOICEBOX
    drop-cause normal-unspecified
    drop-cause no-circuit-channel-available
    drop-cause network-out-of-order
    drop-cause temporary-failure
    drop-cause switching-equipment-congestion
    drop-cause access-info-discarded
    drop-cause circuit-channel-not-available
    drop-cause resources-unavailable
    route call 1 dest-interface IF_SIP_VOICEBOX

  service hunt-group HG_SIP_VOICEBOX_TO_ISDN_1_2
    drop-cause normal-unspecified
    drop-cause no-circuit-channel-available
    drop-cause network-out-of-order
    drop-cause temporary-failure
    drop-cause switching-equipment-congestion
    drop-cause access-info-discarded
    drop-cause circuit-channel-not-available
    drop-cause resources-unavailable
    route call 1 dest-interface IF_ISDN_1
    route call 2 dest-interface IF_ISDN_2

context cs switch
  no shutdown

authentication-service VOIP_AS_0
  username patton password qGTMpyb4Xs7I+HE/4la0pg== encrypted

location-service VOIP_LS_0
  domain 1 local

  identity patton

    authentication inbound
      authenticate 1 authentication-service VOIP_AS_0 username patton

context sip-gateway voicebox

  interface lan
    bind interface LAN context router port 5060

context sip-gateway voicebox
  bind location-service VOIP_LS_0
  no shutdown

port ethernet 0 0
  medium auto
  encapsulation ip
  bind interface WAN router
  no shutdown

port ethernet 0 1
  medium auto
  encapsulation ip
  bind interface LAN router
  no shutdown

port bri 0 0
  clock auto
  encapsulation q921

  q921
    permanent-layer2
    protocol pp
    uni-side auto
    encapsulation q931

    q931
      protocol dss1
      uni-side net
      bchan-number-order ascending
      encapsulation cc-isdn

port bri 0 0
  shutdown

port bri 0 1
  clock auto
  encapsulation q921

  q921
    permanent-layer2
    protocol pp
    uni-side user
    encapsulation q931

    q931
      protocol dss1
      uni-side net
      bchan-number-order ascending
      encapsulation cc-isdn
      bind interface IF_ISDN_1 switch

port bri 0 1
  no shutdown

port bri 0 2
  clock auto
  encapsulation q921

  q921
    permanent-layer2
    protocol pp
    uni-side user
    encapsulation q931

    q931
      protocol dss1
      uni-side net
      bchan-number-order ascending
      encapsulation cc-isdn
      bind interface IF_ISDN_2 switch

port bri 0 2
  no shutdown