User guide

13
Chapter 2 - Installation
MTPSR2-201
8-Position DIP Switch
The ProxyServer is equipped with a 8-position DIP switch. Figure 2-2 shows the DIP switch, and the
chart that follows details the default positions and other options.
56781234
Figure 2-2. 8-position DIP switch
Position 1: OPEN* (up) Normal Mode operation
Closed (down) Loopback Mode operation
Position 2: OPEN* (up) DDS clocking
Closed (down) Internal Clocking
Positions 3 - 8:Reserved for future use.
* Denotes Factory Default setting
Note: The DIP switch settings cannot be changed externally; you must remove the circuit board from
the chassis. Refer to the steps in the next section, V.35 Shunt Procedure, for instructions on
removing the circuit board.
V.35 Shunt Procedure
If you are using an external DCE device on the WAN 2 RS232/V.35 port, and the connection will be a
V.35 connection, the the interal shunt must be moved from the RS232C (default) position prior to
cabling and power-up. The following steps detail the procedures for switching the shunt.
Step Procedure
1 Ensure that the external power supply is disconnected from the ProxyServer.
2 Turn the ProxyServer over and remove the cabinet mounting screw from the chassis.
Front Panel
Back Panel
Cabinet Mounting Screw
Figure 2-3. Cabinet Mounting Screw
3 Being sure to support the back panel, turn the ProxyServer right-side-up, tilt the back
panel down, and slide the circuit board out of the chassis.