Service manual

Troubleshooting Tables
4-14
No modem at remote site The local modem could not complete the
connection. The most likely causes are:
1. Telephone cable disconnected from
local modem.
2. Remote modem turned off or discon-
nected from telephone line.
3. Telephone prematurely disconnected at
remote site.
4. Excessive noise on the telephone line.
5. Incompatible transmission protocols on
remote and local modems.
6. Incompatible modem setup strings on
the remote and local modems.
7. The remote modem did not answer the
phone cal within the time specified in
the modem’s S7 register, and the @
symbol is not present in the telephone
number string in the cardiograph tele-
phone directory.
1. Check all cable connections.
2. Be sure the remote modem is turned on
and connected to the telephone cable.
3. Retry the transmission.
4. Retry the transmission.
5. Check the cardiograph telephone direc-
tory and verify telephone number,
device type, and transmission speed.
6. Check the modem initialization string
commands that allow compatibility
with the remote modem.
7. Be sure the remote site is ready to
receive the transmission. Consider
extending the time the modem waits
for a connection by adding the string
“S7=90” to the modem initialization
string.
Transmission stopped unexpectedly. X of
N ECGs received.
Cable/ modem problem, Press any key to
continue.
No power to modem, or poor modem
cable connection.
Check that at least on of the modem’s
LEDs is on. Check that the data cable is
attached to the modem and to the cardio-
graph’s RS-232 port. Check operation of
the RS-232 port.
Transmission stopped unexpectedly. X of
N ECGs received.
Modem was disconnected. Press any key
to continue.
Problem with telephone line or remote
modem.
Check that at least on of the modem’s
LEDs is on. Check that the data cable is
attached to the modem and to the cardio-
graph’s RS-232 port. Check operation of
the RS-232 port.
Be sure the remote site is ready to receive
the transmission.
Retry the transmission at 2400 bps.
Transmission stopped unexpectedly. X of
N ECGs sent. Remote site stopped com-
munication (nnnn). Press any key to con-
tinue.
or
Transmission stopped unexpectedly. X of
N ECGs received. Remote site stopped
communication (nnnn). Press any key to
continue.
Communication speed of the remote
device does not match that of the cardio-
graph, or the remote site modem malfunc-
tions. The (nnnn) is the event code
associated with the message, and is
recorded in the event log when this mes-
sage appears. These events relate to the
transmission protocol. See Table 4-9 for a
list of event codes.
Be sure the remote site is ready to receive
the transmission.
Be sure the remote site is ready to send
the transmission.
Table 4-8 Transmission (Option #A05 only)
Message Possible Cause Possible Solutions