This Adapter Doesn't solve the Plantronic HL10 handset problem caused by the STRAIGHT PLUG
THE PROBLEM: Plantronics HL10 Handset lifters are somehow being sold with 3.5mm STRAIGHT plug/male piece, instead of 3.5mm ELBOW (i.e., 90 degree angle) plug/male piece. The straight piece does not work with the HL10 lifter - it needs an elbow type.
NEEDED SOLUTION: So, what is needed to resolve the problem is a 3.5mm female to 3.5mm elbow male adapter.
THE PROBLEM WITH THIS ADAPTER: The problem with this adapter is that it is a 3.5mm female to 2.5mm elbow male - so, it doesn't work to resolve the problem. 2.5mm is too small.
To solve the problem, look for a 3.5mm female to 3.5mm elbow (90 degrees) male adapter.
This simply adheres to landline using peel and stick tape supplied. Allows me to walk around great distances and be alerted through earpiece that phone is ringing and lift handset and speak on telephone.