PowerWalker SNMP DP-522 - Manual (Page 93)

Appendix B -3 Ports NetAgent II with SMS Modem
BP506 & SMS MODEM Hardware Installation：
1:
A：GSM MODEM。
B：GSM MODEM Adaptor 。
C：NetAgent BP506。
D：GSM MODEM Cable。
E：RS232 to RJ45 Cable。
2：How hardware should be connected
3：Before use GSM MODEM, insert SIM
4： Once card inserted, Modem would detects if such SIM card has password and the
signal with its ISP.
If Led flashes every second continuously, there is no signal been received. OR, SIM
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