Good question Ed. Currently I'm using one of the built in SLT ports and have an SLB pack for 4 more and it fails on both. I wouldn't have even thought to try it with an SLA since they make the SLB pack for the STSe. It would even work if you could push the DND button after it started ringing to send it to the answering machine. Of course DND doesn't work after the fact either.


Retired phone dude