Toshiba GD-1210 - Manual (Page 168)

7 REGISTERING AND SETTING ITEMS
166 2nd Line Board (optional) Installation
Transmission and reception (TX/RX)
6
Press the [TX/RX] button.
7
Press the [ENTER] button.
Reception only (24HR)
6
Press the [RX ONLY (24HR)] button.
7
Press the [ENTER] button.