Nortel Networks DCT1900 manual User Functions

Technical Product Manual - DCT1900

System Description, System Overview

Voluntary Intra System Handover

If the best bearer of another Base Station is at least 6dB or better during a number of consecutive frames, the Portable Telephone will start a handover to that Base Station.

Voluntary Inter System Handover

For handovers, only REs with the RE status ALLOWED and TEMP_NOT_ALLOWED are considered as alternatives:

zThe RE status of the other RE is equal to the RE status of the current RE. If the best bearer of a Base Station of another RE is at least 12dB or better during a number of consecutive frames and there is a bearer free on this Base Station, an inter RE handover will be started.

zThe system status of the other system is lower than the system status of the current system. If, during a number of consecutive frames, the RE status of the other RE is lower than the RE status of the current RE, and the best bearer of a Base Station of the other RE is at least 12dB better and of the current RE no other Base Station is detected and the current Base Station has no other bearers available, then a location update will be started.

Forced Intra System Handover

If the quality of the traffic bearer becomes unacceptably bad, an immediate attempt to find a different bearer is started. This may result in a handover.

Forced Inter System Handover

If a good bearer cannot be found within the current RE, alternative systems will be investigated in the history list. If no RE is found, the Portable Telephone quickly scans its environment to find a valid bearer. If a bearer is found and the network has not yet cleared the call, the Portable Telephone continues to scan its environment. If the network has cleared the call, e.g. because the search took too long, the Portable Telephone will release the call.

2.3User Functions

The user functions are depending on type of interface between the RE and the connected Telephone Network, and the features supported by the connected Telephone Network.

2.3.1DCT1900 Mobility Configuration and E1-CAS Standalone when connected to a MD110

Calling Party Number (ID)

Calling party number is the extension number shown to the user on a Portable Telephone display upon receipt of an incoming call and used to identify who is calling. The maximum length equals 24 digits.

Connected Party Number

This feature will enable the PBX to inform the user of the party to which it is connected. The maximum length is 24 digits. The message can be expected at outgoing call set–up or whenever the other party changes.

Redirecting Party Number

The same as connected party number, except that it will only be sent when the call is diverted towards another extension. The maximum length is 24 digits.

System-DCT1900/R8/mw	2-11
© 2000-2005