QUESTION 3/6 

Networks for shared multiple services 
(Continuation of Question 4/6)

Background and justification
The local subscriber and the distribution networks have been providing the means for subscriber connection to the basic telephone service, without encountering any major transmission problems at voice frequencies (300 to 3400 Hz). There is now a trend to support multiple services of one or more providers on common cables (copper and optical) and in other parts of the network. This is called “unbundling the network”, i.e., when more than one operator are sharing the network or are co-located in the same network.
Therefore, it is necessary to establish the quality and maintain the integrity of existing and new subscribers loops and the distribution network for multi-services when accommodating new operators.

Study items

• the criteria to assess the safe coexistence in the same part of the network of more than one operator providing multi-services such as POTS, ISDN, xDSL, etc, without any kind of detrimental interaction.
• the use of technical solutions that provide for the easy implementation of unbundling whilst maintaining the integrity, reliability and interoperability within network topologies, which are commonly used worldwide.
  Relationships

Relationships

• ITU-T SG 5
• ITU-T SG 15
• IEC SC46C
• IEC SC86C

Deliverable