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New Contributor

Adtran 908 PRI Routing

We have a customer set up with 2 SIP backhauled PRI's.

Customer is dialing (slowly) and their PBX inter-digit timer expires. Upon expiry, the customer PBX sends a PRI SETUP with an invalid number. The Adtran 908 receives the PRI SETUP and sends the SIP INVITE to the soft-switch. The soft-switch rejects the call with a SIP 484 (Address Incomplete) back to the Adtran 908. Which is what we expect to happen.

Once the Adtran 908 receives the SIP 484, it tries to route the call down the 2nd PRI back into the customer's PBX.

1) What could be causing this behavior?

2) How can it be corrected?

Configuration is below. IP addresses and passwords have been changed to protect the innocent...

 

Building configuration...
!
!
! ADTRAN, Inc. OS version R10.9.6.E
! Boot ROM version R10.9.3.B2
! Platform: Total Access 900e (3rd Gen), part number 4243924F1
! Serial number CFG1503548
!
!
hostname "XXXXXXXXXXXXXX"
enable password XXXXXXXX
!
!
clock timezone -6-Central-Time
!
ip subnet-zero
ip classless
ip routing
ipv6 unicast-routing
!
!
!
!
no auto-config
!
event-history on
no logging forwarding
no logging email
!
no service password-encryption
!
username "admin" password "XXXXXXX"
!
banner motd #
        Important
SSH & Web username/password is configured to admin/password.
Enable and Telnet passwords are configured to "password".
Please change them immediately.
The gig 0/1 interface is enabled with an address of 1.2.3.4
Telnet/SSH access is also enabled.
#
!
!
no ip firewall alg msn
no ip firewall alg mszone
no ip firewall alg h323
!
!
!
!
!
!
!
!
no dot11ap access-point-control
!
!
!
!
!
!
!
ip dhcp pool "Private"
  network 1.2.3.0 255.255.255.0
  netbios-node-type h-node
  default-router 1.2.3.1
!
!
!
!
!
!
!
ip crypto ffe
!
!
!
!
!
!
!
interface eth 0/1
  description WAN interface to Meta
  ip address  6.7.8.9  255.255.255.0
  no ip proxy-arp
  media-gateway ip primary
  no shutdown
!
!
interface eth 0/2
  no ip address
  shutdown
!
!
!
interface gigabit-eth 0/1
  ip address  1.2.3.1  255.255.255.0
  no shutdown
!
!
!
!
interface t1 0/1
  description DO_NOT_USE_FOR_PRI!!
  fdl none
  shutdown
!
interface t1 0/2
  description DO_NOT_USE_FOR_PRI!!
  fdl none
  shutdown
!
interface t1 0/3
  description T1 PRI to PBX
  fdl none
  tdm-group 1 timeslots 1-24 speed 64
  no shutdown
!
interface t1 0/4
  description T1 PRI to PBX
  fdl none
  tdm-group 2 timeslots 1-24 speed 64
  no shutdown
!
!
interface pri 1
  description pri 1
  role network b-channel-restarts enable
  isdn name-delivery display
  connect t1 0/3 tdm-group 1
  digits-transferred 4
  no shutdown
!
interface pri 2
  description pri 2
  role network b-channel-restarts enable
  isdn name-delivery setup
  connect t1 0/4 tdm-group 2
  digits-transferred 4
  no shutdown
!
!
interface fxs 0/1
  impedance 600r
  no shutdown
!
interface fxs 0/2
  impedance 600r
  no shutdown
!
interface fxs 0/3
  impedance 600r
  no shutdown
!
interface fxs 0/4
  impedance 600r
  no shutdown
!
interface fxs 0/5
  impedance 600r
  no shutdown
!
interface fxs 0/6
  impedance 600r
  no shutdown
!
interface fxs 0/7
  impedance 600r
  no shutdown
!
interface fxs 0/8
  impedance 600r
  no shutdown
!
interface fxs 0/9
  impedance 600r
  no shutdown
!
interface fxs 0/10
  impedance 600r
  no shutdown
!
interface fxs 0/11
  impedance 600r
  no shutdown
!
interface fxs 0/12
  impedance 600r
  no shutdown
!
interface fxs 0/13
  impedance 600r
  no shutdown
!
interface fxs 0/14
  impedance 600r
  no shutdown
!
interface fxs 0/15
  impedance 600r
  no shutdown
!
interface fxs 0/16
  impedance 600r
  no shutdown
!
interface fxs 0/17
  impedance 600r
  no shutdown
!
interface fxs 0/18
  impedance 600r
  no shutdown
!
interface fxs 0/19
  impedance 600r
  no shutdown
!
interface fxs 0/20
  impedance 600r
  no shutdown
!
interface fxs 0/21
  impedance 600r
  no shutdown
!
interface fxs 0/22
  impedance 600r
  no shutdown
!
interface fxs 0/23
  impedance 600r
  no shutdown
!
interface fxs 0/24
  impedance 600r
  no shutdown
!
!
isdn-group 2
  connect pri 1
!
!
isdn-group 3
  connect pri 2
!
!
!
!
!
!
!
!
!
!
!
!
ip route 0.0.0.0 0.0.0.0 6.7.8.1
!
no tftp server
no tftp server overwrite
http server
http secure-server
no snmp agent
no ip ftp server
no ip scp server
no ip sntp server
!
!
!
!
!
!
!
!
sip
sip udp 5060
sip tcp 5060
!
!
!
voice feature-mode network
voice timeouts interdigit 3
voice flashhook mode transparent
voice forward-mode network
voice conferencing-mode local
voice codec-priority offer-sdp
!
!
!
!
!
!
!
!
voice timeouts named-digit-timeout international 5
!
voice timeouts named-digit-timeout quick 2
!
voice timeouts named-digit-timeout slow 4
!
voice dial-plan 2 long-distance 1-NXX-NXX-XXXX
voice dial-plan 3 local *XX-NXX-XXXX
voice dial-plan 4 long-distance *XX-1-NXX-NXX-XXXX
voice dial-plan 5 long-distance XXX-XXX-XXXX
voice dial-plan 6 local NXX-XXXX
!
!
!
!
voice class-of-service GLOBAL
!
voice codec-list TRUNK
  codec g711ulaw
!
voice codec-list G711ONLY
  codec g711ulaw
!
voice codec-list USERS
  codec g711ulaw
!
!
!
voice trunk T01 type sip
  description "SIP Trunk to Provider"
  sip-server primary 3.3.3.3
  registrar primary 3.3.3.3
  domain "3.3.3.3"
  codec-list USERS both
!
voice trunk T02 type isdn
  description "ISDN PRI"
  resource-selection linear ascending
  connect isdn-group 2
  no early-cut-through
  modem-passthrough
  rtp delay-mode adaptive
  codec-list TRUNK
!
voice trunk T03 type isdn
  description "ISDN PRI"
  resource-selection linear ascending
  connect isdn-group 3
  no early-cut-through
  modem-passthrough
  rtp delay-mode adaptive
  codec-list TRUNK
!
!
voice grouped-trunk NETWORK
  trunk T01
  accept $ cost 0
!
!
voice grouped-trunk PRI
  description "PRI voice grouped trunk"
  trunk T02
  accept $ cost 0
!
!
voice grouped-trunk PRI2
  trunk T03
!
!
!
!
!
!
voice mgcp-endpoint 1
  alc
  connect fxs 0/1
  description "MGCPfarendpoint1"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 2
  alc
  connect fxs 0/2
  description "MGCPfarendpoint2"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 3
  alc
  connect fxs 0/3
  description "MGCPfarendpoint3"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 4
  alc
  connect fxs 0/4
  description "MGCPfarendpoint4"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 5
  alc
  connect fxs 0/5
  description "MGCPfarendpoint5"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 6
  alc
  connect fxs 0/6
  description "MGCPfarendpoint6"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 7
  alc
  connect fxs 0/7
  description "MGCPfarendpoint7"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 8
  alc
  connect fxs 0/8
  description "MGCPfarendpoint8"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 9
  alc
  connect fxs 0/9
  description "MGCPfarendpoint9"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 10
  alc
  connect fxs 0/10
  description "MGCPfarendpoint10"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 11
  alc
  connect fxs 0/11
  description "MGCPfarendpoint11"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 12
  alc
  connect fxs 0/12
  description "MGCPfarendpoint12"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 13
  alc
  connect fxs 0/13
  description "MGCPfarendpoint13"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 14
  alc
  connect fxs 0/14
  description "MGCPfarendpoint14"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 15
  alc
  connect fxs 0/15
  description "MGCPfarendpoint15"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 16
  alc
  connect fxs 0/16
  description "MGCPfarendpoint16"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 17
  alc
  connect fxs 0/17
  description "MGCPfarendpoint17"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 18
  alc
  connect fxs 0/18
  description "MGCPfarendpoint18"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 19
  alc
  connect fxs 0/19
  description "MGCPfarendpoint19"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 20
  alc
  connect fxs 0/20
  description "MGCPfarendpoint20"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 21
  alc
  connect fxs 0/21
  description "MGCPfarendpoint21"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 22
  alc
  connect fxs 0/22
  description "MGCPfarendpoint23"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 23
  alc
  connect fxs 0/23
  description "MGCPfarendpoint23"
  modem-passthrough
  plc
  t38
!
voice mgcp-endpoint 24
  alc
  connect fxs 0/24
  description "MGCPfarendpoint24"
  modem-passthrough
  plc
  t38
!
ip mgcp
ip mgcp call-agent primary 3.3.3.3
ip mgcp local-domain-name media-gateway
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
ip rtp symmetric-filter
!
!
!
line con 0
  no login
!
line telnet 0 4
  login
  password XXXXXX
  no shutdown
line ssh 0 4
  login local-userlist
  no shutdown
!
!
ntp server 64.233.128.155 version 3 source ethernet 0/1 prefer
!
!
!
end
Labels (3)
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Highlighted
New Contributor

Re: Adtran 908 PRI Routing

Note: We are certain that the soft-switch isn't sending the 'rerouted' call via SIP. The Adtran seems to be making this decision on it's own.

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Highlighted
Honored Contributor
Honored Contributor

Re: Adtran 908 PRI Routing

Instead of:

voice grouped-trunk PRI

  accept $ cost 0

use:

voice grouped-trunk PRI

  accept [dial pattern of valid DIDS on the PRI]

for example:

voice grouped-trunk PRI

  accept  31255501XX cost 0

if your DID block is 312-555-01XX

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