Clear-Com uses the ETSI DECT Sync signal. Below this text is an excerpt from the spec.
This signal appears across pins 3 and 6 of the DECT Ref OutRJ-45 connector on the rear of the E-Que. Pin 3 is + It’s
It’s a 100 HZ pulse train with the positive pulsesabout pulses about 880 usec µs wide, and every 16th pulse is 2640 usecµs , three timesas times as wide. This same signal also appears across pins 3 and 6 of thetransceiver the transceiver RJ-45. On
On a FSII base, the same signal appears across pins 1 and 2of the Synch Out RJ-45. B
B.2.1 Synchronization signal
The synchronization signal is a 100 Hz signal having positive pulses of width between 5 μs and1 ms, except for frame 0 (every 16th pulse), which has a pulse width between 2 ms and 5 ms. This signal establishes the10 ms DECT frame interval and the 160 ms DECT multiframe interval.
The synchronization signal shall have a long term frequency accuracy of better than ± 5 ppm (nominal conditions) or± 10 ppm (extreme conditions).
As the wave form is asymmetric, devices can establish proper timing relations in the event that the differential pair
...
of input signal wires is (improperly) connected (pair inversion).
The random phase jitter on the falling edge of the synchronization signal shall not exceed 0,5 μs rms. The
...
differential amplitude shall be greater than 400 mV peak to peak.