The CPE will need to have egress network access to the Sangoma FAXStation platform via the following:
|TCP||443||HTTPS||Sangoma||CPE uses HTTPS to talk with platform for all fax TX/RX as well as provisioning|
|UDP||4332-4339||N/A||Sangoma||CPE connects to platform for remote management/diagnostics/firmware|
|UDP||123||NTP||Public||CPE contacts us.pool.ntp.org for network time protocol if local RTC is not available or skew is too high|
|UDP||53||DNS||N/A||CPE uses DNS for hostname resolution, DNS servers provided by connected network DHCP server, or as specified in manual network configuration|
Note, no port forwarding, NAT configuration, etc is required for FAXStation CPE to operate. The above listed ports need to be allowed egress (outbound) access by the CPE (with stateful return traffic allowed).