GF82.70-P-0003-05T Telephone (D-Network) Mobile Subscriber to Mobile Subscriber

GF82.70-P-0003-05T Telephone (D-network) Mobile Subscriber To Mobile Subscriber
- with CODE (380) Preinstallation for MB phone "CTEL", complete
- with CODE (381) MB phone "Standard" in console on right side of dome

Component Identification:

Mobile subscriber to mobile subscriber
Mobile subscribers (A) and (B) have logged into the D-net outside of the reception range of their (home) mobile switching center (MSC).
They are then logged into the best located base transceiver station (BTS) and base station controller (BSC) in the closest (external) mobile switching center (MSC) and are registered in the home location register (VLR) there.
The (external) mobile switching centers (MSC) automatically connect to the responsible (home) mobile switching center (MSC) (MSC, A is not shown) and inform them of the momentary location of the subscribers.
The location of the corresponding mobile subscriber is then registered in both (home) mobile switching centers. If a mobile subscriber (A) wants to complete a call to mobile subscriber (B) he enters his number.

This number allows determination of the location of mobile subscriber (B) by his (home) mobile switching center (MSC, B). With the information on the location, the system then transmits the call from mobile subscriber (A) to mobile subscriber (B) via the best communication path.
During a call the system automatically continues to search for the best communication possibility to minimize transmission losses. The transfer in the radio network takes the following course:
^ Mobile telephone
^ Base transceiver station (BTS)
^ Base station controller (BSC)
^ Mobile switching center (MSC)
^ Mobile switching center (MSC-B)