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PRI Between TA 908e and Shoretel T1K

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Hello,

I'm running into an issue with the T1 hand-off between an Adtran 908e Gen 2, and a Shoretel T1K

Due to a hardware failure, we are replacing an Adtran Total Access 904 (Gen 2) (R13.5.1.E) with a Total Access 908e (Gen 2) (R13.5.0.E).

These devices hand off to a Shoretel SG-T1K

Using the exact same cable, moving from T1 0/2 of the TA 904  to T1 0/3 of the TA 908e, the interface remains in a DOWN status. But when the same cable is connected to the TA 904, I did confirm that the status of T1 0/2 changes to an UP status.

I created a loopback cable and confirmed that T1 0/3 of the TA 908e changed to an UP status.. No errors were observed when sending test pattern (QRSS)

But again, moving the exact same cable to the T1 0/3 interface of the 908e, the interface doesn’t come up.

I did this for all 4 T1 ports of the 908e, and none of them came up.

For troubleshooting purposes I created several cable variations (straight through, cross-over, T1/NET cross-over (1-4,2-5) T1/NET straight through, etc.) none of which caused a change in status of the interface. The only exception was the Loopback, that brought the interface to an “UP” status. 

I went as far as adjusting the T1 interface’s lbo to match the length of the cable, or attempt to compensate for /any/ possible noise by adjusting the dB level of the lbo.. None of which worked either..

Changing the primary timing source to T1 0/3 didn't change anything due to the DOWN status of the T1 interface.

I changed the timing source back to internal as the primary, and T1 0/3 as the secondary.

I also confirmed that both switch types are National ISDN 2.

I have also updated the tdm-group from 1 to 3 (and reversed) with no change.

The SIP trunk is registered, and have had no issues on the SIP side of this configuration.

interface t1 0/3

  description Hand-off to PBX

  framing esf

  coding b8zs

  lbo long 0

  fdl ansi

  remote-loopback

  remote-alarm rai

  alias

  snmp trap link-status

  no snmp trap threshold-reached

  no snmp trap line-status

  tdm-group 3 timeslots 1-24 speed 64

  no shutdown

interface pri 1

  description pri 1

  alias

  isdn switch-type ni2

  role network b-channel-restarts enable

  no isdn name-delivery

  no calling-party override

  calling-party presentation allowed

  calling-party screening auto

  no area-code

  no calling-party number

  calling-party name-facility-timeout 2

  connect t1 0/3 tdm-group 3

  digits-transferred all no-prefix

  redirecting-number as-received

  no isdn alert disable pi-8

  no isdn connect enable pi-2

  no isdn setup enable pi-1

  no isdn setup enable pi-3

  isdn setup enable redirecting-number

  isdn pi-location public

  no isdn supplementary-service tbct

  no isdn supplementary-service tbct notify-controller

  no isdn supplementary-service tbct transfer-counters

  isdn supplementary-service tbct active-transfers 100

  isdn supplementary-service tbct transfer-rate 10

  isdn supplementary-service tbct d-channel-id auto

  snmp trap link-status

  no shutdown

isdn-group 1

  call-type any

  incoming-accept-number $

  min-channels 0

  max-channels 0

  resource pool-member

  connect pri 1

timing-source internal

!

timing-source t1 0/3 secondary

voice class-of-service Default

  override-passcode

  default-level

  aa-dnd

  absent-message

  block-caller-id

  call-privilege all

  camp-on

  conference

  disable-callwaiting

  dnd

  external-fwd

  forward

  hold

  hotel

  logout-group

  message-waiting

  park

  redial

  remote-fwd

  retrieve-park

  return-last-call

  station-lock

  system-speed

  transfer

!

voice codec-list "G.711 & .729"

  no default

  codec g711ulaw

  codec g729

!

voice codec-list TRUNK

  no default

  codec g711ulaw

!

!

!

voice trunk T01 type sip

  description "SIP"

  resource-selection circular descending

  no reject-external

  no caller-id-override number-inbound

  no caller-id-override name-inbound

  caller-id-override emergency-outbound match-substitute

  no caller-id-override privacy-outbound match-substitute

  no trunk-number

  no busy all

  match ani "$" add p-asserted-identity [redacted]

  sip-server primary [redacted] udp 5060

  sip-server rollover timeout-only

  no sip-server validation

  no snmp trap registration

  registrar primary [redacted] udp 5060

  registrar threshold percentage 50

  registrar expire-time 3600

  registrar max-concurrent-reg 32

  registrar require-expires

  no outbound-proxy primary

  no conferencing-uri

  domain "0.0.0.0"

  dial-string source to

  no sip-keep-alive

  max-number-calls 23

  no alert-info incoming auto-answer

  no alert-info outgoing auto-answer

  register [redacted] auth-name [redacted] password encrypted [redacted]

  no trust-domain

  no p-assert-diversion

  no check-supported replaces

  no subscribe

  no alc

  no rtp dtmf-relay offer

  no rtp media video filter

  media-loopback

  codec-list TRUNK both

  no prefer trunk-routing

  no grammar request-uri host-resolve

  grammar request-uri host sip-server

  grammar from host sip-server

  no grammar from host override registered-users

  grammar from user domestic

  grammar p-asserted-identity host sip-server

  grammar to host sip-server

  grammar supported 100rel

  no grammar require 100rel

  no grammar proxy-require privacy

  grammar alert-info url 127.0.0.1

  grammar user-agent default

  grammar user-agent include firmware-version

  no grammar user-agent include serial-number

  no grammar user-agent include hostname

  no grammar user-agent include custom-text

  grammar refer-to intratrunk-attended-transfer source to-from

  no trunk-group-id

  authentication username [redacted] password encrypted [redacted]

  default-ring-cadence internal

  no update-supported

  diversion-supported

  no transfer-mode

  no ringback override 180

  no ringback override 183

  prefer double-reinvite

  prefer reinvite-without-sdp

  no sip-server monitor

!

voice trunk T02 type isdn

  description "PRI"

  resource-selection circular descending

  no reject-external

  no caller-id-override number-inbound

  no caller-id-override name-inbound

  no caller-id-override emergency-outbound

  no caller-id-override privacy-outbound match-substitute

  connect isdn-group 1

  early-cut-through

  no alc

  no modem-passthrough

  no modem-passthrough cng-early-detect

  no t38

  t38 redundancy high-speed 0

  t38 redundancy low-speed 0

  t38 max-buffer 200

  t38 max-datagram 72

  t38 max-rate 14400

  t38 ced length 3000

  no t38 ced auto-generate

  no t38 generate-cng

  no t38 cng-relay-selective

  t38 v21-preamble-timeout 1700

  t38 error-correction redundancy

  t38 ecm enable

  t38 fallback-mode g711

  no vad

  no plc

  nls

  no anlp

  echo-cancellation

  rtp tx-gain 0

  rtp rx-gain 0

  rtp frame-packetization 20

  rtp delay-mode adaptive

  rtp packet-delay nominal 50

  rtp packet-delay fax 50

  rtp packet-delay maximum 100

  no rtp qos dscp

  rtp dtmf-relay nte 101

  no media-loopback

  no codec-list

  no prefer trunk-routing

!

!

voice grouped-trunk NETWORK

  no description

  resource-selection linear

  trunk T01

  accept $ cost 0

!

!

voice grouped-trunk PRI

  no description

  resource-selection linear

  trunk T02

  accept $ cost 0

===============================

t1 0/3 is DOWN

  Description: Hand-off to PBX

  Transmitter is sending remote alarm

  Receiver has loss of signal, loss of frame

  T1 coding is B8ZS, framing is ESF

  FDL type is ANSI

  Line build-out is 0dB

  No remote loopbacks, No network loopbacks

  Acceptance of remote loopback requests enabled

  Tx Alarm Enable: rai

  Last clearing of counters 3d 15:34:29

    loss of frame  : 1, current duration 3d 15:34:28

    loss of signal : 1, current duration 3d 15:34:28

    AIS alarm      : 0

    Remote alarm   : 0

  DS0 Status: 123456789012345678901234

              XXXXXXXXXXXXXXXXXXXXXXXX

  Status Legend: '-' = DS0 is not allocated

                 'X' = DS0 is allocated (nailed)

  Signaling Bit Status: 123456789012345678901234

                   RxA: ------------------------

                   RxB: ------------------------

                   TxA: ------------------------

                   TxB: ------------------------

                        123456789012345678901234

  Line Status: -- LOS -- Red -- Tx Yellow --

  5 minute input rate 0 bits/sec, 0 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

  30 second input octet rate  0 bytes/sec, frame rate 0 packets/sec

  30 second output octet rate 0 bytes/sec, frame rate 0 packets/sec

  5 minute input octet rate  0 bytes/sec, frame rate 0 packets/sec

  5 minute output octet rate 0 bytes/sec, frame rate 0 packets/sec

  Current Performance Statistics:

    0 Errored Seconds, 0 Bursty Errored Seconds

    0 Severely Errored Seconds, 311 Severely Errored Frame Seconds

    311 Unavailable Seconds, 0 Path Code Violations

    0 Line Code Violations, 0 Controlled Slip Seconds

    0 Line Errored Seconds, 0 Degraded Minutes

  TDM group 3, line protocol is not set

    Encapsulation is not set

pri 1 is DOWN

  Description: pri 1

  Switch protocol:  National ISDN 2

  Signaling role:  network (NT) b-channel-restarts enabled

  b-channel-restarts:  enabled

  Calling-party override:  disabled

  Calling-party presentation:  allowed

  Calling-party screening:  auto

  Calling-party number:  (no number configured)

  Digits transferred all

  Name-delivery:  disabled

  Progress indicator #8 in alerting message:  enabled

  Progress indicator #2 in connect message:  disabled

  Progress indicator #1 in setup message:  disabled

  Progress indicator #3 in setup message:  disabled

  Progress indicator location:  public

  resource-selection: circular descending

  TBCT:  disabled

  area code: 

  Transmission of redirecting numbers is enabled

  Redirecting numbers: sent as received

  Connected interface: t1 0/3 tdm-group 3

  Channel status 123456789012345678901234

                 --------------------------------

    Legend: - = Unallocated        . = Inactive

            A = Active B channel   B = Backup D channel

            D = Active D channel   M = Maintenance

            R = Restart

  Last clearing of "show interface" counters: never

    0 packets input, 0 bytes, 0 no buffer

    0 runts, 0 giants, 0 throttles

    0 input errors, 0 CRC, 0 frame

    0 abort, 0 discards, 0 overruns

    0 packets output, 0 bytes, 0 underruns

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Valued Contributor
Valued Contributor

Re: PRI Between TA 908e and Shoretel T1K

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On the TA 904 (non-E), the T1 0/2 interface is a DSX-1 interface. The transmit and receive pairs are reversed so as to use a straight-through cable to customer equipment.

The TA 908E, has 4 T1 interfaces (no DSX-1 interfaces).

If you are moving a cable from T1 0/2 on the TA 904 to T1 0/3 on the TA 908E, then you will need to cross-over the transmit and receive pair on the cable.

You can look at this guide for the T1 cross-over cable pin-outs: Loopback Adapters and Crossover Cables for T1 and DDS Circuits

Hope this helps,

Patrick

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Valued Contributor
Valued Contributor

Re: PRI Between TA 908e and Shoretel T1K

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On the TA 904 (non-E), the T1 0/2 interface is a DSX-1 interface. The transmit and receive pairs are reversed so as to use a straight-through cable to customer equipment.

The TA 908E, has 4 T1 interfaces (no DSX-1 interfaces).

If you are moving a cable from T1 0/2 on the TA 904 to T1 0/3 on the TA 908E, then you will need to cross-over the transmit and receive pair on the cable.

You can look at this guide for the T1 cross-over cable pin-outs: Loopback Adapters and Crossover Cables for T1 and DDS Circuits

Hope this helps,

Patrick

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Re: PRI Between TA 908e and Shoretel T1K

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Hello Patrick,

Thank you for the quick response. I'll dispatch to the site and re-try. Thank you!

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