What antenna should I use and max cable length

Hello,

We are looking to install several Peplink units throughout our school district. Some of the installation locations may require an external antenna to achieve reliable cellular signal strength.

Could you please recommend the appropriate external antenna for these installations? I would also like to know the maximum recommended antenna cable length before signal loss becomes a concern.

Some of our installations may require the antenna to be mounted outside or on the roof, so I want to make sure we select the correct antenna and cable type to maintain the best possible signal. We are installing the Max BR1 Mini.

Thank you,
Larry