Differentiate between GSM and CDMA ?
GSM
- GSM uses multiple frequencies.
- Uses TDMA and FDMA for accessing signals.
- The voice rate is 9.6 KBPS.
- Uses less bandwidth.
CDMA
- CDMA uses single frequency as carrier.
- The voice rate is 14.4 KBPS.
- CDMA power control to access method is better as Phased Locked Loops are used.
- Follows soft handoff, hence call handling is more efficient.
- GSM uses multiple frequencies.
- Uses TDMA and FDMA for accessing signals.
- The voice rate is 9.6 KBPS.
- Uses less bandwidth.
CDMA
- CDMA uses single frequency as carrier.
- The voice rate is 14.4 KBPS.
- CDMA power control to access method is better as Phased Locked Loops are used.
- Follows soft handoff, hence call handling is more efficient.
What is broadband?
- Broadband is an internet access with high speed.
- Unlike dial-up connection, broadband connection is permanently connected.
- It allows internet and telephone calls to take place simultaneously. No new land line is required.
- Modulation is done in broadband on signals to transform data better.
What are the reasons for call drop?
A call drop occurs when
- Slips occur in media.
- There is some antenna tilting.
- Phone goes out of range.
- Electric and mechanic tilts occur.
- Signal interference occurs.
