Gentner Microtel MICROTEL-1 Telephone Interface Box, 1-Line, Conf-Enabled, RJ-11

Crestron Telephone Interface and Audio Signal Generator Module; CEN-TIA

Northern Telecom M-7208B Office Telephone w/ Handset & Stand - New In Box

Comrex TCB-1 Telephone Coupler - Broadcast Audio Interface

Videotek VIS-1201

Gentner G3200 Telephone Interface. Can be used to record phone conversation.

Gentner Microtel Broadcast Telephone Handset Line Interface Recording Patch IFB

Bosch Telex RTS TIF 2000A Single Line Digital Hybrid Telephone Interface w/ PS