Radwin Ltd. WL1000F49 Manuel D’Utilisation

  TDM Clock Configuration 

WinLink 1000  

D-2 

Behavior in fault configuration 

 

D.3 

Clock selection 

WINLink 1000 automatically selects a single trunk for the timing. The 
trunk is selected according to the following rules: 

• 

Smaller trunk number 

• 

Both ends line state is in Normal 

• 

Each line state change in the selected trunk re-triggers a new 
clock selection according the above rules. 

If the selected trunk is in Los of Signal state, the WINLink 1000 uses its 
internal clock. 
There are two methods to configure the user equipment. 

• 

Master / Slave mode – One of the sites is defined as the clock 
master while the other site is configured as a time loop (received 
clock) 

• 

Independent (Plesynchronous) Mode – Each site is configured as 
timing Master 

In both user configurations WINLink 1000 system re-generates the 
selected 

IN

 clock of the opposite site and use it as the 

OUT

 clock for all 

trunks.  
In case that there is no 

IN

 clock in the selected trunk, WINLink 1000 

use its internal clock (and re-generate it in the opposite site as an 

OUT

 

clock). 

 

It is user responsibility to verify that all IN clocks of a site are derived 
from a single clock source. 

 

D.4 

Behavior in fault configuration 

Where there are different transmit clocks at the external equipments of 
the same site, pattern slips are expected. The pattern slip rate is 
proportional to the clock difference. For example if in site A E1 – 1 in 
clock is 2.048 Mb/s and E1 – 2 in clock is 2.048 Mb/s + 1 PPM and all 
trunks are in normal state, a pattern slip of up to 2000 bits is expected 
in trunk 2 every 1000 seconds. 

Note