Siemens I-SURF - Manual (Page 63)

11. Troubleshooting
57
Loopback Test
An error
message
appears after the
test USB connection
error Has the PC been
correctly
connected to I-
Surf USB? Establish correct
USB connection.
ISDN S0 cable
error Has I-Surf USB
been correctly
connected to the
ISDN outlet? Establish correct
ISDN connection.
ISDN S0 bus
error Is the S0 cable
between the S0
outlet and the
ISDN NTBA
correctly wired?
Are the terminal
resistors in
place? Does a
standard ISDN
phone work when
connected to this
S0 outlet? Establish correct
S0 bus
connection.
Different types of
S0 cables used Disconnect other
devices
connected to the
S0 bus and
repeat the test. Is
it passed now? Replace the
cable of the other
ISDN device.
ISDN error
0x3492 Second B
channel busy Is a connection
may be active on
the second B
channel? Terminate all
other
connections.
ISDN error
0x3492 Incorrect phone
number Is the phone
number dialed
the adapter’s
MSN? Enter the correct
number.