Comtech EF Data DTMX5000 SpectraCast - Manual (Page 28)

Installation DTMX5000 IP Gateway
2–4 Rev. 1
6. Click OK. The window closes and the Phone Number window opens.
7. In the Connect using field, scroll down the dropdown list and select either
COM 1 or COM 2, depending where the local terminal is connected. Click OK.
The Phone Number window closes and the COM Properties window opens.