Connection Quality
| Wireless WAN |
2-9 Kbps |
2-9 Kbps |
|
| Dial-up modem (14.4 Kbps) |
9.6 - 14.4 Kbps |
9.6 - 14.4 Kbps |
8kHz (mono, telephone or AM-radio quality) |
| Dial-up modem (33.6 Kbps) |
33.6 Kbps |
33.6 Kbps |
16 kHz or 22 kHz (mono) |
| Dial-up modem (56 Kbps) |
56 Kbps |
33.6 Kbps |
|
| ISDN, one B channel (BRI) |
56 - 64 Kbps |
56 - 64 Kbps |
16 kHz or 22 kHz (stereo) or 44 kHz (mono) |
| ISDN, two B channels (BRI) |
128 Kbps |
128 Kbps |
44 kHz (stereo hi-fi) |
| IDSL (Symmetric, no concurrent analog telephone, 1 copper pair) |
144 Kbps |
144 Kbps |
|
| Two-way satellite |
300-900 Kbps |
50-150 Kbps |
|
| Fixed-point wireless |
300 Kbps - 1 Mbps |
60-500 Kbps |
|
| Cable |
200 Kbps - 1.2 Mbps (theoretical: 7 Mbps) |
100-200 Kbps |
|
| ADSL Lite (Asymmetric, concurrent analog telephone, 1 copper pair) |
up to 1.5 Mbps |
up to 384 Kbps |
|
| HDSL (Symmetric, no concurrent analog telephone, 2 copper pairs) |
1.54 Mbps |
1.54 Mbps |
|
| HDSL2 (Symmetric, no concurrent analog telephone, 1 copper pair) |
1.54 Mbps |
1.54 Mbps |
|
| ISDN (PRI) |
up to 1.544 Mbps |
up to 1.544 Mbps |
|
| Fractional or full T1 |
384 Kbps - 1.544 Mbps |
384 Kbps - 1.544 Mbps |
VHS quality |
| ADSL (Asymmetric, concurrent analog telephone, 1 copper pair) |
144 Kbps - 2.2 Mbps (theoretical: 8 Mbps) |
90-640 Kbps |
|
| SDSL (Symmetric, no concurrent analog telephone, 1 copper pair) |
up to 2.3 Mbps |
up to 2.3 Mbps |
|
| RADSL (Rate Adaptive Digital Subscriber Line) |
7 Mbps |
1 Mbps |
|
| 10Base-T Ethernet |
10 Mbps |
10 Mbps |
|
| T3 |
44.736 Mbps |
44.736 Mbps |
|
| VDSL (Asymmetric or Symmetric, concurrent analog telephone, 1 copper pair) |
up to 51 Mbps |
up to 51 Mbps |
|
| FDDI (Fiber Distributed Data Interface) |
100 Mbps |
100 Mbps |
|
| Frame Relay |
56 Kbps - 155 Mbps |
56 Kbps - 155 Mbps |
|
| SONET (Synchronous Optical Networking) |
51.84 Mbps - 2,488.32 Mbps |
51.84 Mbps - 2,488.32 Mbps |
|
| ATM |
25 - 655 Mbps or faster |
25 - 655 Mbps or faster |
|
| Gigabit ethernet |
1 Gbps |
1 Gbps |
|
| OC-192 |
10 Gbps |
10 Gbps |
|
AT Commands
| ATA |
answer the phone |
| ATDT or ATDP |
dial using tone or pulse dial |
| ATH |
hang up phone |
| A/ |
repeat last command |
| ATS0=x |
answer after x rings, 0 turns off auto-answer |
| ATZ |
reset to default wake state |
| ATM0 |
no speaker |
| ATM1 |
speaker on while dialing, off after connection made |
| ATM2 |
speaker on always |
| ATM3 |
speaker off while dialing, on until connection over |
| ATLx |
volume adjustment L0,L1 = low L2 = medium L3 = high |
| ATX4 |
report connection speed, busy signal, no dial tone detected |
| ATDS=x |
dial phone # x that is stored in memory |
| AT&Zx=n |
store number n is memory slot x |
| , |
pause for 2 seconds |
| W |
wait for next dial tone before proceeding |
| ++++ |
go to command state |
| ATQ0V1 |
give result codes in words, not numbers |
| AT&F |
reset to factory defaults (careful using) |
| AT&K3 |
use hardware flow control |
| AT&K4 |
use software flow control |
| ATI3 |
show firmware version number of modem (if available) |
