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Ground Start PBX

I have a PBX that uses ground start lines. What equipment can I use to provide SIP to Ground Start lines?

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Honored Contributor
Honored Contributor

Re: Ground Start PBX

Analog ground-start lines are supported by the FXS ports of the TA900 series, any generation or model.

Syntax is:

interface fxs 0/1

   signal ground-start

Please verify that you have a good ground connection to the grounding stud on the back of the TA900, preferably to the same communications ground being used by the PBX. Tip/ring polarity must be kept consistent as well when using ground-start lines.