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Hipath 4000 V.8

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Sar2021

Technical User
Sep 2, 2021
11
MN
Hi
We have Os4000 v.8 system and interconnected cellular provider by PRI E1. OS4000 -by E1 to- UCM Grandstream IP- by SIP to -Cellular provider.
Sometimes, When I make a call to cellular phone on the calling side (A) doesn't hear calling ton, but on cellular phone ( B side) ringing normally, when answer no voice in both side.
Sorry my poor English, What we should check configuration.
 
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