Ericsson ZAT 19.2 Operation Manual page 215

7.6 Troubleshooting
If you meet problems of any kind using encryption, configure your
modem to extended connect messages, +Q3 command.
7.6.1 Messages from call modem:
CRYPT ENTRY NOT FOUND
Your modem is unable to find the telephone number (given by
the D command) in the password table, or the number is not
marked for encryption (K).
ENCRYPTION ERROR: NO REMOTE V42/MNP
An error free link (V.42 bis or MNP) could not be established.
Encryption is impossible.
ENCRYPTION ERROR: NO REMOTE LOGIN STRING
The password mode is not active in the remote modem. (Doesn't
transmit the message "Enter password for remote modem")
ENCRYPTION ERROR: PASSWORD NOT ACCEPTED BY
REMOTE
The password transmitted from the calling modem to the remote
modem is not accepted. (The password stored in the userfield in
the password table).
ENCRYPTION ERROR: NO REMOTE CRYPT RESPONSE
The key negotiation parameter is not transmitted from the
remote modem. The remote modem is obviously set to ordinary
password mode.
KEY INDEX NOT FOUND
Key index received from the remote modem is not stored in the
key table.
CRYPT MODULE MISSING
The hardware module required for synchronous encryption is missing.
SYNC CRYPT HANDSHAKE FAILED
The encryption handshake with key negotiation failed.
7.6.2 Messages from the answer modem:
KEY INDEX NOT FOUND
Activated key index in the key negotiation is not stored in the key
table. The content in the password list doesn't agree with the key
table.
7.6.3 Data mode:
If transmitted data is received in unreadable hieroglyphics, most
probably the keys in the two modems are not identical. (Another
reason might be the communication speed and format).
LZTR104006 R1.00 7-21
Zat 14.4/14.4-7 and 19.2/19.2-7