Something I've been dealing with for years and I'm hoping other people have seen this and may have an answer.
An Adtran's FXS interface will sometimes stop working at random. Could be weeks, could be months. Eventually, a single FXS interface can see calls with ring voltage but when they pick up the calls it's either dead air or one-way audio on analog phones and even on lineman's test sets. The lineman's test set also cannot break dialtone as if DTMF is not being detected. Debug shows no digits dialed. This seems to only impact a single interface at a time. All the other FXS interfaces will be making calls without issue. I will sometimes see two or more FXS affected at the same time which leads me to believe it could be a per-interface setting.
A reboot of the ADTRAN will ALWAYS resolve the problem and the interface will start working like normal for another random amount of time. A Shut-no shut will typically not resolve the issue. Any ideas the community has would be helpful.
ADTRAN, Inc. OS version R13.12.1.E
Mainline Version: ENM.21.103
P4 Changelist: 674169
Checksum: ab8d9294ba96cd18c33b949d9a598d7846f45759919cbc8389007b141c66b25f
Built on: Fri Jan 21 08:14:05 CST 2022
Hardware version Vesuvius v.193.1.1.2.7-3
Boot ROM version R13.7.0.B1
Built on: Thu Jul 16 22:09:40 CDT 2020
Compatibility Version: 1
Copyright (c) 1999-2022, ADTRAN, Inc.
Platform: Total Access 908 (3rd Gen), part number 4213908F1
Serial number CFG1879064
Flash: 216084480 bytes DRAM: 509648896 bytes
Cheshire_Med_Winchester uptime is 1 week, 6 days, 16 hours, 31 minutes, 14 seconds
slot 0, DSP 1
DSP software version: G3.R1.5.0-R
DSP hardware version: Freescale BSC9131
Total channels: 60
System returned to ROM by Soft Reset
Current system image file is "T900G3A-R13-12-1-E.biz"
Primary boot system image file is "T900G3A-R13-12-1-E.biz"
Backup boot system image file is "T900G3A-R13-12-0-E.biz"
Primary system configuration file is "startup-config"
--- Debug of Call Attatched--
