Toa VS-900 - Manual (Page 19)

19
10.4. RS-191 Option Handset (Indoor type)
10.4.1. Wall mounting
Mount the option handset to an electrical box mounted in the wall.
RS-191
Oval head combination screw
M4 x 25 (accessory)
2-gang electrical box
YC-302 (optional)
10.4.2. RS-190 and RS-191 connection
Plug out the jumper from the connector on the RS-190's side panel, then plug the RS-191's connection cable
instead as illustrated below.
RS-191
RS-190
Jumper
Connection cable
Accessory screws
The RS-191 comes with 2 types of screws: oval head
combination screw M4 x 25 and oval head slotted screw
UNC No.6 x 18.
For the electrical box provided with unified threads, use
the oval head slotted screws UNC No.6 x 18.