TecPreview Multi-Service Access Nodes with Both H.248 or SIP Protocol Tuesday, 9 October | 13:00 – 13:20

By introducing broadband technology to fixed networks, DSLAMs went into COs to be installed in parallel to the TDM-switches. This parallel deployment of different and dedicated equipment will remain valid as long as the subscriber will use existing phone devices for voice (POTS/ISDN) connection.

In the meantime VoIP has become a standardized and commonly used technology, and it is going to substitute the existing PSTN equipment offering lower costs in CAPEX and in OPEX as the service provider may operate one single IP/Ethernet-based network. Especially the OPEX reduction is a strong motivation to speed up with VoIP introduction also for existing and still fully functional PSTN networks. The most useful way to migrate from TDM to VoIP is to introduce voice functionality into exiting xDSL equipment. This allows for immediate integration and full capability within the next-generation network.

Maintaining and reusing the existing infrastructure from CO (or street cabinet) to the subscriber is of essential importance. This means no extra spending will occur between central office and the subscriber's home. On the other hand the translation from TDM-based voice into VoIP within the multi-service access node saves CAPEX and OPEX in the upper level network, namely the aggregation and backbone.

Both signaling protocols H.248 and SIP are currently being used whereof a clear trend toward SIP can be seen. With this approach a clear move to build a full integrated simplified network is on its way to success.

Presenter
Ulrich Haeckl, is currently head of Business Operations and Planning for Global Solution Sales Management of Broadband Access. Previously, he acted as vice president of Business Management Carrier Ethernet for IP DSLAM. Prior to that he held various management positions within the Communications Branch of Siemens AG in Germany and other countries for more than 20 years.