CANOGA PERKINS 3240S SNMP Managed Fiber Optic Multiplexer - Manual (Page 24)

3240S F I B E R O P T I C M U L T I P L E X E R
3240S Fiber Optic Multiplexer
The V.35 I/O card operates in full duplex mode. This is to encompass all clocking options that are valid subject to whatever
restrictions are imposed by the user application. The E1/V.35 interface is also interoperable with the standard E1 interface,
with the following restrictions:
• The E1X board must be set to AMI Coding
• The two pass-thru controls on the E1/V.35 card will be inoperable
2.3.3.3 I/O Internal Jumpers
Each I/O card must have the proper time slot allocation, line coding and line build out set. There is an internal jumper for
setting the board address, or Time Slot Allocation, for the board. Additionally, there are jumpers for setting the line code for
each of the three ports, with the exception of the V.35 I/O card which is transparent to line coding. Reference Figure 2-8 for
jumper locations.
2.3.3.3.1Time Slot Allocation / Board Address
Time Slot Allocation, similar to the T1 interface, is set by jumper W3 and cannot be set via the NMS. Install the jumper for
time slots 1 and 3. Leave the jumper out, or off for time slots 2 and 4. Both cards at each end of the link must be set to the
same address. No other card in the unit can be set to the same address.
2.3.3.3.2 Line Coding HDB3 or AMI
There is a separate jumper for setting the line coding for each port. Install the jumper for HDB3 (High Density Binary
Three) coding. Leave the jumper out (off) for AMI (Alternate Mark Inversion) coding. The attached equipment at each
end of the link and both E1 ports at each 3240S must be set for the same coding or errors will be recorded wherever the
coding does not match.
This function can be set by the NMS. The jumper must be out (off) if it is being controlled by the NMS. The factory setting
for line coding is AMI, or jumper out (off). The line coding jumper for port 1 is W4, port 2 is W5, and port 3 is W6. Line coding
does not need to be set for the V.35 I/O card. This interface is transparent to both AMI or HDB3 coding, therefore the jumpers
W4, W5, and W6 are not present on this interface.
2.3.3.4 I/O Rear Panel Switches and Indicators
There is a Mode switch and up to three LEDs (LOS, AIS and LOOP) associated with each of the three ports on the manageable
E1X cards. The V.35 card utilizes only two LEDs, LOS and LOOP. The LEDs and mode switch are located on the front of the
interface module and to the left of the E1 connectors with which they are associated. The function of the LEDs are as follows:
• LOS - The Loss of Signal Indicator signifies that no signal is present on the E1 connector input; pins 1 and 9 on the
DA-15, 4 and 5 on the RJ-48C, 2 and 15 on the DB-25, or the Tx on the BNC connector.
• AIS - The Alarm Indicator Signal Indicator signifies that an "all 1's" signal is present on the 1 connector input; pins
1 and 9 on DA-15, 4 and 5 on the RJ-48C, or the Tx on the BNC. This LED is not present on the V.35 I/O card.
• LOOP - The I/O Port Loopback Indicator works in conjunction with the I/O Port Mode Switch and Management to
give a visual indication at both ends of the link that an I/O port, Local or Remote loopback is active.
The I/O Port Mode Switch (I/O Port Loopback or Test Switch), is a three-position switch (LOC/NOR/REM) used to set I/O
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