8G093X01 R5
VR Programming Guide
August 2022 Page 135 of 144
Appendix 2 – Grant Timeout Timer
Motorola Solutions Technical Notification (MTN-0053-18-NA)
TITLE: Multiple issues when using DVRS with TDMA
TECHNOLOGY: DVRS (digital vehicular repeater system)
SYMPTOMS:
Symptom 1: A TDMA talkgroup is configured for “interrupt never” operation. A call on this TDMA talkgroup is in
progress from a portable subscriber unit (PSU) through the DVRS to other radios. Another system subscriber unit
(SSU) attempts to interrupt the call in progress. This interrupting talkgroup call is granted when it should not have
been granted.
Symptom 2: When using DVRS on a TDMA talkgroup, a subscriber may experience a grant followed by a call
where the PSU audio is not successfully transmitted through the system. Private calls do not experience this
problem.
MODELS / SYSTEM RELEASES / KITS / DATECODES AFFECTED:
DVRS
SEVERITY RECOMMENDATION:
Low / Maintenance - Perform if system exhibits above symptoms
ROOT CAUSE / DEFINITIVE TEST:
Delayed audio from the PSU causes the grant timer to expire before the DVRS/PSU audio is detected at the RF site.
WORKAROUNDS AND CORRECTIVE ACTIONS: NA
RESOLUTIONS AND REPAIR PROCEDURES:
Set the zone level Grant Timeout Timer in the UNCW to 2.2 seconds or greater when any DVRS units are
in use.
PARTS REQUIRED (HARDWARE / SOFTWARE): NA
ADDITIONAL INFORMATION: NA
REFERENCE THE FOLLOWING DOCUMENTS/PROCESSES FOR INSTALLATION PROCEDURES: NA
WHEN TO APPLY RESOLUTION:
After reboot __
After (re)installation __
After upgrade __
After power cycle __
After database restoration __
After failure __
On FRU replacement __
During maintenance __
Immediately __
As instructed _X_
Information only __
LABOR ALLOWANCE:
This is an informational bulletin. No labor warranty is implied, intended or authorized for U.S. Domestic Partners /
Customers. Other regions should follow their own standard procedures.
For assistance with this bulletin please contact your MSI Technical support centre
https://www.motorolasolutions.com/en_us/support.html
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