6
SPSVT26xx-10x
24-hour Technical Support: 1-800-260-1312 International: 00-1-952-941-7600
Installation
— Continued
Set the Jumpers
The SPSVT26xx-10x has three jumpers located on the circuit board inside the
Device housing. To set any of the three jumpers:
1.
Using a small screwdriver, remove the four (4) screws that secure the cover
and carefully remove the cover from the Device.
2.
Locate the jumper(s) on the circuit board.
3.
Using small needle-nosed pliers or similar device, move the jumper(s) to the
desired position(s).
4.
Carefully replace the cover on the Device and replace the four (4) screws that
secure the cover to the Device.
Hardware/Software Jumper (J4)
The Hardware/Software jumper (J4) is located on the
circuit board and is the jumper that is nearest the rear
connector of the Device
(see the photo to the right)
.
Hardware
The terminal timing switch controls the
terminal timing function. The loop-back
switch controls the loop-back function.
Software
The terminal timing switch and the loop-back
switch are disabled. These two functions are
controlled by the most-recently saved, on-
board microprocessor settings.
Note:
Setting the terminal timing switch to “F” overrides the software mode and
sets the Device to asynchronous mode.
Remote Management
The SPSVT26xx-10x stand-alone Device can be remotely managed by the
CPSVT26xx-10x, the chassis version of the Device.
For example, a local CPSVT2611-100 Device (that is installed in a managed
Transition Networks PointSystem™ chassis)
is connected, via fiber, to a remote
SPSVT2611-100 Device. An example of a managed single-fiber network has a
local CPSVT2629-100 Device connected, via fiber, to a remote SPSVT2629-101.
Note:
In a managed network, both the local and remote Devices must be set to
“software” mode
(see above).
For more information, see the SNMP section in the CPSVT26xx-10x user’s guide
on-line at: www.transition.com.
Software Mode
Hardware Mode
H
S
H
S
J4
J4
Rear Connector
[email protected] -- Click the “Transition Now” link for a live Web chat.
7
Installation
— Continued
Receive (RX) Clock Polarity Jumper (J6)
The RX Clock Polarity jumper (J6), located near the front panel of the circuit board,
selects the polarity of the receive clock.
Position A
The receive data is sampled on the rising
edge of the receive clock.
Position B
The receive data is sampled on the falling
edge of the receive clock.
Transmit (TX) Clock Polarity Jumper (J7)
The TX Clock Polarity jumper (J7), also located near the
front panel of the circuit board, selects the polarity of the
transmit clock.
Position A
The transmit data is sampled on the rising
edge of the receive clock.
Position B
The transmit data is sampled on the falling
edge of the receive clock.
This drawing illustrates “rising edge” and “falling edge” for clock polarity.
Raising Edge Clock
Falling Edge Clock
Clock
Data
Clock
Data
Position B
J6
Position A
J6
Position B
J7
Position A
J7
J7- TX Clock Polarity Jumper
J6- RX Clock Polarity Jumper
Front Panel
