Appendix A. Status Buffer Messages

TANULL expired

Bonding timer TANULL expired; non BONDING equipment attempted to call into the ISU 512 while optioned for BONDING.

TEMPORARY_FAILURE

The network has temporarily failed; try the call again.

TIMER_EXPIRY

Call control error.

TXADD01 expired

Bonding timer TXADD01 expired, probably making a long distance call to a foreign country; adjust timer value to correct.

TXFA1 expired

Bonding timer TXFA1 expired; other vendor's BONDING equipment did not operate properly.

TXFA2 expired

Bonding timer TXFA1 expired; other vendor's BONDING equipment did not operate properly.

TXINIT expired

Bonding timer TXINIT expired; called non-BONDING equipment.

UNASSIGNED_NUMBER

The phone number dialed does not exist.

Unknown AT & cmd

User issued an unknown AT command.

UNSPECIFIED_CAUSE

Received a cause message from the network that is not understood.

USER_BUSY

The dialed number is busy.

WRONG_MESSAGE

The ISU 512 received a message that does not match the valid messages de- fined for the switch.

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ADTRAN ISU 512 user manual Temporaryfailure, Timerexpiry, Unassignednumber, Unspecifiedcause, Userbusy, Wrongmessage