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× Questions about D110/210/410 T1/E1/J1 PRI Cards

P7 jumper

5 years 5 months ago #10581 by markterry2
What is the purpose of the P7 jumper on the D210P card? P7 is labeled "Close=PLL Open=CRY".
5 years 5 months ago #10582 by hua

This link will help you
Please check .In a word ,it a switch which control Timing synchronization .
The following user(s) said Thank You: markterry2
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