Netgear XM128 QIG - Quick Install Guide - Page 100
Level 1 Security, Level 2 Security
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Reference Guide for the Model XM128 ISDN Digital Modem The two types of security are summarized in Table B-1. Table B-1. Types of security Type 1 Security Remote (Calling) Site NETGEAR ISDN device only Password Check Automatic Protocols Supported X.75, V.120 AT Commands *G1 for Level 1 security *G2 for Level 2 security Type 2 Security Can be modem of any brand Interactive Any data protocol *G3 for Level 1 security *G4 for Level 2 security *G5 for Level 3 security Level 1 Security This security level performs only password checking. With Level 1 security, the local modem maintains the connection if the password is matched. Otherwise, the line is disconnected. Level 2 Security Level 2 security provides extra calling party number (CPN) checking and callback. The callback number is prestored in the password table. If the password has been matched (in a maximum of three tries over a 40-second time period) with its prestored password list, the local modem checks the calling party number (or origination address for 1TR6) against the prestored number corresponding to the password. If they are matched, the local modem chooses either to keep the connection or to disconnect; then it calls back according to the following settings of bit 6 of S119: • S119.6=0 This setting prompts the modem to connect and then to call back. • S119.6=1 This setting prompts the modem to keep the connection. If the CPN does not match what is stored in the table, the local modem disconnects the call. If CPN is unavailable in the setup message, the local modem disconnects the call and calls back using the prestored number corresponding to the dial-in password. B-2 Security Functions