After the detailed network planning documents, the other important task in detailed network planning is to produce the source data necessary to integrate for each network element. The input information needed to complete the data sheets is to some extent collected during network assessment and network dimensioning and is contained in the network master plan. Some of the main inputs for detailed network planning are: ET allocation numbers and types Points of interconnection (POI) Number of PCMs towards each POI Signalling point codes for each network element and whether STP usage is allowed Signalling point names Signalling links and link sets: names and numbering Signalling route and route sets: names and numbering Network element naming and numbering plan Naming and numbering plan principals - Circuit groups - Destinations - Subdestinations - Charging cases - Routes Analysis trees and their usage Preanalysis Emergency and service call routing: routing zones, service and emergency numbers Detailed numbering plan for engineering, subscriber number ranges Announcements, etc. Some of the important document deliverables after the detailed network planning are: Naming and numbering plan Network topology and trunking plan Network interconnect plan Roaming plan Routing plan Signalling plan Network synchronisation plan Announcements and network tones, etc. Naming and Numbering Conventions It is important to create a naming and numbering plan prior to preparing source data forms. Once such guidelines have been prepared, they should be strictly followed. Changes of identifiers and labels in a later phase are likely to cause errors and data inconsistency in the network. Core Network Planning and Optimisation As an example: Naming of circuit groups to MGWs: MGNNXXY uniquely identifies a circuit group (CGR) to specific MGWs where identifies the MGW location identifies the MGW X by number identifies consecutive circuit groups the same as MGW Circuit group number should be unique in the network element. The CGR numbers can be d