User Manual

Module Front Panel LED Indicators and Connectors – continued
5/21/04 1X SC4812T–MC BTS Optimization/ATP 6-29
DRAFT
The clock is a sine wave signal with a minimum amplitude of +2 dBm
(800 mVpp) into a 50 Ω load connected to this port.
SYNC Monitor Connector
A test port provided at the CSM front panel via a BNC receptacle allows
monitoring of the “Even Second Tick” reference signal generated by the
CSMs.
At this port, the reference signal is a TTL active high signal with a pulse
width of 153 nanoseconds.
MMI Connector
Only accessible behind front panel. The RS–232 MMI port connector is
intended to be used primarily in the development or factory
environment, but may be used in the field for debug/maintenance
purposes.
GLI LED Status Combinations
GLIs may be GLI2 or GLI3. Either supports the 1X
SCt4812T–MC BTS.
NOTE
GLI
The GLI module has indicators, controls and connectors as described
below and shown in Table 6-27 (GLI2) and Table 6-28 (GLI3).
The operating states of the LEDs are:
ACTIVE
Solid GREEN – GLI is active. This means that the GLI has shelf
control and is providing control of the digital interfaces.
Off – GLI is not active (i.e., Standby). The mate GLI should be active.
MASTER (not on GLI3)
S Solid GREEN – GLI is Master (sometimes referred to as MGLI).
S Off – GLI is non-master (i.e., Slave).
ALARM
S Solid RED – GLI is in a fault condition or in reset.
S While in reset transition, STATUS LED is OFF while GLI is
performing ROM boot (about 12 seconds for normal boot).
S While in reset transition, STATUS LED is ON while GLI is
performing RAM boot (about 4 seconds for normal boot).
S Off – No Alarm.
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