Telehelper Model 200 Single Line Hold
manufactured for AT&T by GTI Corporation
comments:
this device works well for holding call from any telephone, but does interfere with using call waiting or 3-way calling.
device will automatically disconnect after 6 minutes, not good for longer hold times
Matthew Furman On-Line | www.matthewfurman.net
Saturday, February 15, 2025 08:47:30 PM