HP Compaq Presario,Presario 1234 Brochure page 13

Compaq Global Mini PCI 56k (V.90) Modem by 3Com
The ATI11 command may be issued from online command mode or after the end of a call. After
a call, some values are no longer valid; it is useful to know which ones. Each of the line items in
the ATI11 result is explained next:
1. V.90, 56K, V.34, or V.32 depending on the type of connection negotiated.
2. Initial upstream rate.
3. Initial downstream rate.
4. Current or final upstream rate.
5. Current or final downstream rate.
6. LAPM or MNP or None, depending on V.42 negotiation.
7. V.42bis or MNP or None, depending on V.42 negotiation.
8. Mean-square error of received downstream signal. This is the difference between received
constellation point and reference decision point. This is a dimensionless decimal number,
only valid during a call. Higher numbers are worse. There is no absolute quality threshold; it
depends on the downstream data rate. The number varies during a call, so it can be useful to
sample a few times.
9. The received signal power, although labeled –dBm, is only a relative measure for comparing
calls to/from different locations. Only valid during a call.
10. Upstream transmit signal power.
11. Round-trip delay in milliseconds.
12. Echo levels are valid for V.34 only.
13. Echo levels are valid for V.34 only.
14. Number of LAPM frames sent upstream during this call. Count wraps around at 65535.
15. Number of REJ frames received at the analog client modem.
16. Number of LAPM frames received by the client during this call. Count wraps at 65535.
17. Number of frames received in error by the client.
18. Number of retrains or rate renegotiations requested by this modem.
19. Number of retrains or rate renegotiations requested by remote modem.
20. Reason for call ending, only valid after call ends.
0 = Local modem command: ATH, DTR drop.
1 = Remote modem: cleardown, loss of signal.
2 = No answer, busy, etc.
3 = Training failure V.90, K56flex, or V.34.
4 = Protocol failure if required by \N4, for example.
21. For PCM connection, a hexadecimal 6-bit pattern of T1 frames with robbed-bit signaling.
22. For PCM connection only, the downstream digital loss.
23. For K56flex connection only, the V.8bis info sent by the server. Meaning is defined at the
server and by convention.
0203-0799-A
13
White Paper