- This topic is empty.
27th September 2007 at 09:54 #49308paulGuest
what will be the position of microwave tranmission with the emergence of fibre optics.28th September 2007 at 07:05 #49309Imran SabirGuest
Microwave and fibre optics have altogether different applications.
Microwave is mostly used where we have terrain problems for the Fibre layout.
The mantainance cost of Microwave is much less as compareable to Fibre.
The overall cost per E1/Km of Fibre is much expensive than the microwave.
The outage time in case of Fibre breakage is much more as compare to microwave.
Optical fibre is more prone to natural calamaties than the microwave28th September 2007 at 11:32 #49310Javed ShaikhGuest
No Dial Tone in Mobile Phone why ?
Please give me appropiate answer Asap.28th September 2007 at 18:55 #49311emreGuest
in fixed switch waits DTMF codes.
but mobile wanna digital codes29th September 2007 at 07:38 #49312javed shaikhGuest
Not a convincing reply.
In telephones the instrument has dedicated lines connected till the exchange whereas Mobile sends periodic information.
We need much more technical answers to testify.
Why do mobile phones dont have dial tones?30th October 2007 at 07:13 #49313pixGuest
in fixed lines, the “called party” number is sent in real time to the switch, via frequencies. Each time a digit is typed, the switch receives the digit’s frequency right away.
in GSM, the number is sent in one unique message : the whole number is contained in the “CALL SETUP” message. Therefore there is no need to code the digits into frequencies.
regards,31st October 2007 at 06:26 #49314emre igrekGuest
imagine if you have a dial tone in gsm you must use traffic channel between bts and your mobile ,it will consume unnecessary power..