Is it possible to make sip trunk outbound calls from an analog phone to isp sip trunk (analog phone-TA800-s20-ISP sip trunk)
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Sean Wu Dear customer,
Thanks for your contact.
Yes, it is possible. You can refer to the below link to understand the configuration and call flow.
https://support.yeastar.com/hc/en-us/articles/115011199648-How-to-Connect-S-Series-IPPBX-to-TA-FXS-Gateway
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