Hi, what available pnpscada modem option should I select for Landis & Gyr ETM purple modem.

I've never dealt with this modem before.
Can this modem be programmed for IPT? In that case you need to use the IPT modem.
If not IPT, then check if there is a way to set the modem up in a generic mode.
i.e. it gives through whatever you send.
Then you can load it as a Generic Modem onto PNPACADA.

Ok I see its programmable, so maybe if you can get one to us we can try and set it up to work with your system