Sony PCS-G70 Operating Instructions Manual page 210

Symptom
No connection.
Still pictures or the
Phone Book cannot
be saved to the
"Memory Stick."
210
Troubleshooting
Cause
Answering the call is not permitted
by the remote terminal as it is
operating for setups, etc.
The remote terminal is not set to
auto answer mode.
The ISDN telephone numbers are
not set up in the remote terminal
(when using bonding).
The eighth digit and up of the ISDN
telephone numbers are not the same
when connecting using bonding
(when the remote party uses the
videoconference system of an older
model such as the PCS-1600).
There is some problem with the
remote terminal.
A message appears on the screen.
The write-protect tab on the
"Memory Stick" is set to LOCK.
The "Memory Stick" has already
been recorded to full capacity.
Solution
Ask the remote party to permit
answering a call.
Ask the remote party to set the
terminal to auto answer mode, or to
answer a call manually.
Ask the remote party to set up "Area
Code" and "Local Number" in the
ISDN Setup menu correctly (page
64).
Connect without using bonding, or
use the ISDN telephone numbers that
are the same in the eighth digit and
up.
Try to dial the number of another
terminal.
See "On-screen Messages"
(page 200).
Release the lock.
Use another "Memory Stick."