[cisco-voip] Fax topology with ITSP/CUBE and VG310

[daniel at ohnesorge.me]

Hi All,

Just wanted to confirm my understanding with regards to which Fax 
topology to shoose. Some key points:

- The ITSP network to the customer is over a dedicated WAN link with QoS 
enabled
- The ITSP does not support any kind of Fax Relay
- The ITSP uses G711 ulaw for all calls

Topology: 
ITSP---SIP---CUBE---SIP---CUCM---SCCP---VG310---FXS---FAX_Machine

So the goal here is to ensure reliable fax messaging between CUBE and 
VG310. From my understanding, VG310 can only support NSE-based Modem 
Passthrough, NSE-based T.38 relay and Cisco Fax Relay hence I would need 
to enable the same on CUBE. What would be the best topology to choose in 
this scenario?

Appreciate any feedback.

Thanks,
Daniel