Motorola DIMETRA MTS 2, Installation, Configuration And Basic Service Manual

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MTS 2 and MTS 4 Installation, Con
fi
guration and Basic Service Manual E1 Interface
•
Verify that the ‘Current I Line and C Line states’ are shown as ‘ON’ and that
the ‘Current Clock state’ is shown as ‘OK’.
E1 Interface
If the site link interface had been con
fi
gured 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 E1 port indicate the physical E1 port that had been con
fi
gured
for the Site Link using the .e1con
fi
g MMI command.
Contact your local Motorola representative or Technical Support to obtain 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 con
fi
gured 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 con
fi
guration 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 traf
fi
c it is receiving on its E1 interface -
again, this may be caused through transitory errors, or a mismatched con
fi
guration
•
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:E1–1
HDLC Statistics:- ----Rx---- ----Tx----
Good frames : 30 10
Overruns | Underruns : 0 0
C Line | I Line lost : 0 0
CRC/framing errors : 0
No buffers avail : 0
Buffer overflows : 0
6802800U74-N September 2009
13-17