Motorola GTR 8000 Manual page 236

GTR 8000 Base Radio
Table 8-1 GTR 8000 Base Radio General Troubleshooting (cont'd.)
Problem
Device is in a continuous
reset state
Exciter Failure
Analog (4-wire) Portion of
V.24 Hybrid Link Failure
V.24 Portion of Hybrid
Link Fails
8-2
Check all power sources as there may be more than one.
4. Check for any physical damage to the modules and check whether the
modules were properly grounded.
5. Replace any defective modules.
Assure reference inputs are connected to the appropriate input.
Verify that an antenna relay that is Enabled either in the UNC or CSS may have been
disconnected. This causes the base radio to generate an exciter failure because the
antenna relay is controlled and monitored through the exciter module. However, the
exciter failure should be ignored until after the antenna relay failure is corrected.
In a mixed mode configuration, with hybrid links, and when analog link monitor tone
is enabled (Analog Link Idle Check is enabled in the CSS), the base radio detects
a link failure when the analog link monitor tone and call activity are absent on the
receive line (WL1). Analog Idle Link Check in the CSS should be disabled when
comparator type is ASTRO-TAC with DIGI-TAC or ASTRO-TAC with MLC 8000.
When these failure conditions are met, the base radio will:
1. Log an occurrence of the failure in the base radios local event log, which is
retrievable through the configuration interface.
2. If connected to centralized fault management equipment (optional) then the
base radio transmits an alarm indication to the fault manager to alert the
system administrator of the failure.
3. A local visual indication is active due to this failure.
Recovery of the link failure results in a similar set of actions to indicate that the
failure event cleared. Note that a failure of the transport line or a failure of the
opposing host on the wireline link will both appear to the base radio as a link failure.
The base radio cannot distinguish between these two cases.
In a mixed mode configuration, with hybrid links, the base radio detects a V.24 link
failure when packet activity is absent for a period of time on the outbound transmit
line. When these failure conditions are met, the base radio will:
1. Log an occurrence of the failure in the base radios local event log, which is
retrievable through the configuration interface.
2. If connected to centralized fault management equipment (optional) then the
base radio transmits an alarm indication to the fault manager to alert the
system administrator of the failure.
3. A local visual indication is active due to this failure.
4. Invoke a failure announcement for the 4-wire link because the activity on
the 4-wire link is driven by control signaling on the V.24 link. 4-wire link
cannot be used when the V.24 link is down.
Troubleshooting
6871022P86-A - November 2012