TB9400/TN9275 Installation and Operation
Phase 2 Internal Timing
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© Tait International Limited
May 2023
not transmit. The synchronization monitoring page (Monitor >
Synchronization) provides a summary of configuration, operating state and
status to assist in diagnosing problems.
The P25/AS-IP Channel Group System Manual (MND-00002-xx) has
further detail about synchronization requirements for base station
networks.
6.4
Specifications
1PPS fan out: 11 channels
6.5
Prerequisites
When deploying internal timing it can be helpful to provide and check the
following:
Item
Required
Notes
System type: Phase 2 capable,
non-simulcast
Assumed
For other system types, check the table in
External 1PPS signal
Forbidden
Do not enable internal timing when using an
external 1PPS source
NTP timing signal
Not required for
transmit timing
NTP is recommended for log timestamping
Frequency reference
Depending on
frequency band
1PPS wiring
Yes
Connect all channels in daisy-chain fashion.
See
Section 4.6.7 Connecting a 1PPS Source
for cabling details.
Feature licenses
P25 air interface,
P25 Phase 2
Configuration
Configure > Network Interfaces > Trunking
Set all channels at site to be the same.
Enable internal timing.
Enter a site-specific IP multicast address.
Enter a port number.
Disable the simulcast unsynchronized alarm
(Configure > Alarms > Reciter)
a
a. If the simulcast unsynchronized alarm is enabled when using internal timing, the base station re-
port to the trunking site controller will cause the site controller to take the channel out of service.
