Calls to/from PSTN are dropping intermittently. Internal calls for same cluster is fine.
No event viewer messages on the subscriber server.
Gateways are two Cisco 3745 with 2 PRIs on one and one on the other. Nothing in the GW logs.
Gateways were upgraded with c3745-adventerprisek9-mz.124-13e.bin 5 days ago. Issue has been reported this morning.