Hi Luke, Unfortunately we also had issues regarding fax on SU361. When sending faxes using only one line at a time, it seemed to work OK. But as soon as the volume was increased, we did experience crashes like yours. Since fx_ fax is no longer supported in HMP, we did not find any solution than to use an older SU, namely 349, which seems to work fine, there were no more crashes whatsoever. You might want to check if this workaround is OK for you. Chris
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