Service Manual

360
6802800U74-AN
Chapter 13: MTS Troubleshooting
• Verify that the Current I Line and C Line states are shown as ON and that the Current Clock state is
shown as OK.
13.1.3.3.6
E1 Interface
If the site link interface had been configured to use an E1 interface, the state of the E1 interface may
be determined by inspection of the front panel LEDs on the Site Controller. E1 error conditions are
indicated using its LEDs:
• If LED is AMBER FE, CRC, BPV, PD
• If LED is RED – LOS
The LEDs labeled as "1", "2", on the E1 port indicate the physical E1 port that had been configured for
the Site Link using the e1config MMI command.
NOTICE: Contact your local Motorola Solutions representative or Technical Support to obtain
the password.
If the LED is indicating LOS (Loss of signal) error is illuminated, this indicates that there is no E1
framing signal being detected on the configured port. This may be due to external cabling issues, the
lack of a connection to remote E1 equipment, or simply connecting the E1 feed to the wrong E1
connector on the Site Controller. If the LED is AMBER, this indicates that:
• There are E1 framing errors currently being detected. This condition is usually transitory, however, if
persistent, it indicates a configuration mismatch of the E1 framing method in use. Both ends should
be either using E1 multi-frame, or double- frame, but not a mix of the two framing modes FE/CRC
error.
• The remote equipment is detecting errors on the traffic it is receiving on its E1 interface – again, this
may be caused through transitory errors, or a mismatched configuration.
• Electrical noise on the E1 connection, though this may also be caused by faulty remote equipment
BPV error.
The information provided by status bsl for an E1 interface is as follows:
SC) status bsl
Primary Site Link
State:DOWN
Speed: 64000 bps Rear port:E11
HDLC Statistics:- ----Rx---- ----Tx----
Good frames : 30 10
Overruns | Under-
runs
C Line | I Line
lost
CRC/framing er-
rors
: 0 0
: 0 0
: 0
No buffers avail : 0
Buffer overflows : 0
Aborts : 0