nathelper: This is a module to help with NAT traversal. In particular, it helps symmetric UAs that don't advertise they are symmetric and are not able to determine their public address.
fix_nated_contact: rewrites Contact header field with request's source address:port pair.
fix_nated_sdp adds the active direction indication to SDP (flag 0x01) and updates source IP address too (flag 0x02).
Created by: oej,Last modification on Sat 28 of Jul, 2007 [01:40 UTC] by sobomax
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SIP Express router or Kamailio would be good choices. Asterisk is could also do it, but since its more of a PBX model, it has a lot more unneeded overhead for this kind of function.
Hi, I have a Cisco AS5300 facing the TDM which serves as a number translator (rewriting the caller ID into something). The problem is — Cisco has a finite limit on the number of translations that can be done on the AS5300 (approx. 128-300). I was thinking of moving the number translation function into a separate box. What systems do you recommend for this function? Can SIP Express Router or Asterisk do this?
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