CANOGA PERKINS 3240S SNMP Managed Fiber Optic Multiplexer - Manual (Page 34)

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
2.5.1.5 Interface Module Indicators
• LOS, or Loss of Signal Indicator, when illuminated signifies that no signal is present on the T1 input; pins 1 and 9 on
the DA-15 connector, and 4 and 5 on the RJ-48C connector.
• AIS, or Alarm Indicator Signal, when illuminated indicates that an “all 1’s” signal is present on the T1 input; pins 1
and 9 on the DA-15 connector, and 4 and 5 on the RJ-45 connector.
• LOOP, or I/O Port Loopback Indicator works in conjunction with the I/O Port MODE Switch and the NMS to give
a visual indication at both ends of the fiber link that an I/O port, Local or Remote, Loopback is active.
• LPB is the designation on the T1 interface for LOOP.
All I/O Module Card LEDs will be extinguished when the interface connections are properly married and have valid data and
the line coding is properly set. See Sections 2.4 for T1, and 2.5 for E1.
Reference Section 2.5.4 for a definition of all 3240S LED Indicators.
2.5.2 Initial Unit Testing
After you are certain that the initial power-up of your 3240S Fiber Optic Multiplexers has been successful:
• Connect the fiber optic cables. Be sure that the Tx cable of the local multiplexer connects to the Rx connector of the
remote unit. When the connections are made, verify that the SYNC LOSS Indicators on both multiplexers extinguish.
If the fiber cabling was connected at the time of power-up, the SYNC LOSS Indicator should not be illuminated. Ensure
that the LOOP Indicator on both multiplexers is not illuminated.
In a redundant fiber application, the SEC Indicator will also be extinguished along with the SYNC LOSS and LOOP
Indicators. If the ALM Indicator is illuminated, set the redundant optics switch momentarily to PRI; then switch back to
AUTO.
If any Indicators remain illuminated in contrast to the parameters described in section 2.5.1, Initial
Setup Switches and Indicators, verify the integrity of the fiber optic cable connections. Additionally,
check the system and I/O set up switches, and check the HI/LO optical power switch setting in relation
to fiber optic link loss. If these checks do not rectify the problem, loopback features may be used to verify
the fiber optic link integrity, or you may proceed with troubleshooting steps as outlined in Chapter 5,
Troubleshooting.
• Verify the operation of the multiplexers as follows:
• Connect the I/O cables to the multiplexers.
• A data source is required to verify operation. The data source may be a test file that can transmit and receive, or a
bit-error rate tester that generates and receives a test pattern.
• If the multiplexer(s) fails, follow the additional troubleshooting steps outlined in Chapter 5.
• If failure of the 3240S cannot be isolated, contact the Canoga Perkins Service Department for further assistance. In
an emergency situation, call the 24-hour hotline, (800) 360-6642.
All units are designed to interface with specific communications electrical interfaces. Make sure the
interface cables are wired correctly. (Refer to Appendix A for cable pin assignments.)
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