Depre Call Re-establishment...
Ca tot este activ pe Cosmote, în unele LAC-uri (vedeti asta în Test 7, la R : 1 activ, 0 inactiv), si cum niciodata nu a fost prea clar ce reprezinta acest indicator, am cautat putin pe Net, si am dat peste un articol :
QUOTE
Personal communications services (PCS) networks provide telecommunications services to moving users. During a PCS communication session, a radio link is established between the mobile station (MS) and a base station (BS) if the MS is in the cell (the radio coverage area of the BS). If the MS moves to another cell during the conversation, then the radio link to the old BS is disconnected and a radio link to the new BS is required to continue the conversation.This process is called handoff. If the new BS does not have any idle channel, the handoff call is forced to terminate. Besides forced termination due to handoff, a radio link may be temporarily disconnected when propagation loss due to obstacle (e.g., bridges, tunnels) shielding. This phenomenon is referred to as “call interruption.” To avoid forced terminationdue to call interruption, the call reestablishment service hasbeen proposed in Global system for mobile communications (GSM). In this mechanism, if a communication channel is interrupted, the network still reserves the trunk and/or the channel for the interrupted call, and an interruption timer is triggered. If the timer expires or the remote party hangs up the phone before the interruption period is over, the interrupted call is actually forced to terminate. Otherwise, the interrupted call is resumed by the call reestablishment mechanism.
Si altceva în germana, dar care nu prea înteleg (cu traducerile de pe Net nu iese nimic clar) :
QUOTE
"Call Reestablishment" ist ein GSM Netzfeature. Es dient dazu, daß eine Verbindung wieder hergestellt werden kann, wenn sie eigentlich schon abgebrochen ist.
Das geht so: Normalerweise übernimmt das Netz die Kontrolle des Radio Links sowie die Handover. Geht dabei was schief (z. B. der Link bricht schneller zusammen, als das Netz erfolgreich handovern kann), ist das Gespräch weg.
Beim Call Reestablishment übernimmt nun das Telefon die Initiative und ruft "Hallo ich bin noch da - gib mein Gespräch wieder her" Hört das Netz dies, kann das Gespräch wieder hergestellt werden.
Klingt gut - ist aber Mist.
1. ist das Gespräch tot - legt sowieso meistens einer auf.
2. ein Gespräch woanders hin zu routen und erneut aufzubauen ist extrem aufwendig.
3. amoklaufende rumplärrende Telefone hat man nicht so gerne im Netz
Din câte am înteles, prin Call Re-establishment, o comunicatie care este intrerupta din cauza "evaporarii" temporara a semnalului (în tren de exemplu) poate fi reluata daca semnalul revine destul de rapid.