Telekom Deutschland GmbH (TDG) - DeutschlandLAN SIP-Trunk

Q: Which setups are supported and preferred by TDG? A: All Setups listed in above documentation are supported. For OS4K versions <V7R2 a TDM solution is provided by TDG. The TDG Router registers via SIP to TDG, but connects to the OS4K using S2M/S0. Preferred setup from TDG is to connect an STMIX/STMIY/STMI or SoftGate directly with the Certified TDG Routers => Drive the “ALL IP” Rollout

Q: Is NAT supported or DMZ mandatory? A: Both setups are supported with TDG. Due to a special logic the TDG backend/CO is checking if a NAT IP address is used. If yes, then the TDG backend/CO recognizes and sends the payload accordingly.

Q: Is there a special configuration necessary for DeutschlandLAN SIP-Trunk? A: Yes, beside the predefined SIP Profile which needs to be used, also some special rate numbers must be explicitly configured in LCR of OS4K. These must be sent in Subscriber & National type of number format e. g. 110 or 112. Further some default payload settings need to be changed. Please refer to chapter 4.5.3 “Configuration” for a detailed description.

Q: Are secure calls (TLS) supported for DeutschlandLAN SIP-Trunk? A: Yes, supported for STMIX/STMIY and SoftGate. TDG supports SDES Only. STMI supports TCP/UDP & RTP.

Q: Which is the preferred connectivity mode – registration or static? A: In the end it comes down to the network or your needs. Both modes have pros & cons. In case of easiness and NAT, the registration mode might have advantages. In case of fixed host/ip the static mode might be practical.