We only support E1/PRI (ETSI), we do not support SS7, or E1/CAS (R1/R2 Signaling). In regards to the SIP 302 response for redirect, it depends on the application. If terminating SIP from the provider/softswitch, then converting to Analog or PRI/TDM connections with the device, the answer is NO. However, if terminating a analog or PRI/TDM trunks from the provider, and providing SIP connection (to an IP PBX as an example), the answer is YES. This is also true when configuring the device as an SBC (requires optional SBC Feature Pack software).
I went ahead and flagged the "Correct Answer" on this post to make it more visible and help other members of the community find solutions more easily. If you don't feel like the answer I marked was correct, feel free to come back to this post and unmark it. If you still need assistance, we would be more than happy to continue working with you on this - just let us know in a reply.