AT&T Cordless Telephone MLC-6 - Manual (Page 21)

Using the Carrying Holster
The carring holster allows you to carry the handset with you
without having to hold it in your hand. To attach the holster to your
belt, simply thread your belt through the holster's belt loop. Then
slip the handset in to the holster.
To easily remove the handset from the carrying holster, place one
hand on the holster to hold it in place (as shown in the figure
above) and pull the handset out with the other hand.
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