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Intermittent audio issues (no audio, one way audio) are observed on Cisco ISR4K gateways with the NIM-4E/M modules.
Observed on Cisco ISR4K gateway using IOS-XE versions 16.3.2 or 16.4.1 while using "connection trunk" based LMR ports on NIM-4E/M voice modules.
shut / no shut the voice lmr port
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