Module 12 - Enterprise/SOHO Communications Needs and
Solutions
Slide 18 of 30 ________________
Communications Technologies Scalability
| Communications Technologies |
Capabilities |
| Twisted Pair
Telephone Lines |
4.0 K Hz |
| 64 K bps |
| Typical Coax Cable TV System |
350 M Hz |
| ISDN - B Channel |
64 K bps |
| ISDN Basic - D Channel |
16 K bps |
| ISDN Primary |
1.544 M bps |
| ISDN Primary D Channel |
64 K bps |
| ADSL |
1.544 - 6.0 M bps |
| Cable Modem |
750 K bps |
| Ethernet |
10 M bps, 100 M bps, 1,000 M
bps |
| Token Ring |
4 or 16 M bps |
| Frame Relay |
45 M bps |
| ATM |
G bps range |
| SONET |
G bps range |
| WDM |
20 G bps |
| DWDM |
16 + waves through one fiber
(160 + G bps) |
________________
Wire-line communications systems are
scalable from 64 K bps to G bps range. Wire-line systems are capable of
supporting much higher bandwidths than wireless systems.
Wireless Communications Systems Scalability:
| Communications Technologies |
Capabilities |
| 1-G Systems |
|
| 2-G systems |
20 K bps range |
| 3-G systems |
40 Kbps |
| MMDS |
10 M bps |
| LMDS |
50 M bps |
| Microwave |
155 M bps |
| Satellite |
155 M bps |
| Wireless LANs |
|
|
802.11a |
54 M bps |
|
802.11b |
11 M bps |
|
802.11g |
20 M bps |
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