U-90E
Data/Fax
Modem
xiii
13.2.1
Analog Loopback Test (AT&T1) ...............................................................13-2
13.2.2
Analog Loopback with Self-test (AT&T8) ..................................................13-2
13.2.3
Local Digital Loopback Test (AT&T3) .......................................................13-2
13.2.4
Remote Digital Loopback Test (AT&T6) ...................................................13-3
13.2.5
Remote Digital Loopback with Self-test (AT&T7)......................................13-3
13.3 Line
Condition
Report (AT#E1)......................................................................................13-3
13.4 Link
Status
Report (ATI2)...............................................................................................13-4
Indicator Lights ..........................................................................................................................13-7
13.4.1 Retransmission
Indicator ..........................................................................13-7
13.4.2 Dialing
Indicator ........................................................................................13-7
13.4.3
Handshaking And Retrain Indicator ..........................................................13-7
Chapter 14 ....................................................................................................................................14-1
Upgrading Your Modem .............................................................................................................. 14-1
14.1 Upgrading
by Flash EPROM .........................................................................................14-1
14.2 Kernel
Recovery Mode ..................................................................................................14-2
Chapter 15 ....................................................................................................................................15-1
Troubleshooting ..........................................................................................................................15-1
15.1
AT Command Set Problems ..........................................................................................15-1
15.2 Command
Echo Problems.............................................................................................15-3
15.3 Auto-Answer
Problems ..................................................................................................15-3
15.4 Dialing
Problems............................................................................................................ 15-4
15.5 Data
Transfer
Problems.................................................................................................15-5
15.6 Connection
Problems ....................................................................................................15-5
Appendix A....................................................................................................................................... A
Glossary ........................................................................................................................................... A
