Extreme Networks ExtremeSwitching X440-G2 Series Hardware Installation Manual page 119

the X460-G2. The 1588v2 Precision Time feature on the X460-G2 requires the TM-CLK module and the
Network Timing Feature Pack, and does not support stacking.
Two mini-BNC outputs deliver the following signals:
•
10MHz frequency reference
•
1 PPS signal at the top of each second
Caution
The clock module is not hot swappable. You must power down the switch before installing
any VIM modules.
Note
The TM-CLK module has no inputs for timing signals, and it cannot act as a 1588v2
grandmaster clock. The module provides no RJ45 Building Integrated Timing System (BITS)
output, and in particular does not provide the serial time of day output.
Note
The X460-G2 TM-CLK clock module does not accept both 10MHz and 1PPS signals at the
same time, so it can take 10 to 20 minutes or more to lock onto a 1588v2 1PPS signal from the
Apollo2 chip in addition to the usual 15 minutes or more for the 1588v2 servo to lock onto the
remote grandmaster clock.
Figure 109: TM-CLK Module Option
1 = Timing signal mini-BNC outputs
ExtremeSwitching and Summit Switches: Hardware Installation Guide
Expansion Modules
119