I have a teltab 8110 moden with 2 coax cables, ISP say it is ready, how do I connect switch? I do not see this type of connector on switch

As far as I think you can not connect a NTU to a Switch directly.
You have to connect the NTU to the Router and the Router to the Switch.
That's how my company configured or installed in banks and hospitals n other places.

There is the DCE and a DTE RS-232 cable.
You have to check the interface of the router and the NTU modem and then depending of the interfaces get the appropriate cable.
My company used a cisco Router and we mostly used RS-232 DTE Smart Serial cable because the router had a WIC-2T Smart Serial Interface.

The Cable goes from Router's Serial Port to the NTU's interface.