IAX ATA can’t register

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I have an ATCOM ATA that is trying to connect to an asterisk server using IAX. The ATA and Asterisk are on the same subnet, not firewall/nat etc.

Below is a a log excerpt, showing the REGREQ received, and then Asterisk goes on to send lots of REGAUTH…and this continues for a while, but the ATA is never registered (iax2 show peers shows not registered).

Any help would be appreciated. It sure LOOKS like a lot of TX for very few RX frames…so my first guess was network related but I’m not making any progress with that theory

Thanks

Tx-Frame Retry[001] — OSeqno: 003 ISeqno: 001 Type: IAX Subclass: PING
Timestamp: 21003ms SCall: 10027 DCall: 18442 [192.168.67.20:4569]
Tx-Frame Retry[001] — OSeqno: 003 ISeqno: 001 Type: IAX Subclass: PING
Timestamp: 21006ms SCall: 14940 DCall: 18442 [192.168.67.20:4569]
Rx-Frame Retry[Yes] — OSeqno: 000 ISeqno: 000 Type: IAX Subclass: REGREQ
Timestamp: 00003ms SCall: 18443 DCall: 00000 [192.168.67.20:4569]
USERNAME : ALARM-ATA
REFRESH : 60
Tx-Frame Retry[003] — OSeqno: 000 ISeqno: 001 Type: IAX Subclass: REGAUTH
Timestamp: 00014ms SCall: 02267 DCall: 18443 [192.168.67.20:4569]
AUTHMETHODS : 2
CHALLENGE : 121149566
USERNAME : ALARM-ATA
Tx-Frame Retry[002] — OSeqno: 001 ISeqno: 001 Type: IAX Subclass: LAGRQ
Timestamp: 10013ms SCall: 02267 DCall: 18443 [192.168.67.20:4569]
Tx-Frame Retry[001] — OSeqno: 002 ISeqno: 001 Type: IAX Subclass: LAGRQ
Timestamp: 20013ms SCall: 02267 DCall: 18443 [192.168.67.20:4569]
Tx-Frame Retry[000] — OSeqno: 003 ISeqno: 001 Type: IAX Subclass: PING
Timestamp: 21016ms SCall: 10572 DCall: 18443 [192.168.67.20:4569]
Tx-Frame Retry[002] — OSeqno: 000 ISeqno: 001 Type: IAX Subclass: REGAUTH
Timestamp: 00015ms SCall: 14112 DCall: 18443 [192.168.67.20:4569]
AUTHMETHODS : 2
CHALLENGE : 530555480
USERNAME : ALARM-ATA
Tx-Frame Retry[001] — OSeqno: 003 ISeqno: 001 Type: IAX Subclass: PING
Timestamp: 21015ms SCall: 12659 DCall: 18443 [192.168.67.20:4569]
Tx-Frame Retry[001] — OSeqno: 001 ISeqno: 001 Type: IAX Subclass: LAGRQ
Timestamp: 10014ms SCall: 14112 DCall: 18443 [192.168.67.20:4569]
Tx-Frame Retry[000] — OSeqno: 002 ISeqno: 001 Type: IAX Subclass: LAGRQ
Timestamp: 20016ms SCall: 00480 DCall: 18443 [192.168.67.20:4569]
Tx-Frame Retry[000] — OSeqno: 000 ISeqno: 001 Type: IAX Subclass: REGAUTH
Timestamp: 00002ms SCall: 05489 DCall: 18443 [192.168.67.20:4569]
AUTHMETHODS : 2
CHALLENGE : 399007934
USERNAME : ALARM-ATA