MCU devices ViewPoint 8630 can not telnet login, from the RM server can not ping MCU address, but telnet display port 23 open fails, you can not connect; notes webmaster lines directly connected MCU can not ping MCU address, but telnet also also shows port 23 open failed, unable to connect. Version information is as follows:
ViewPoint 8630 MCU: VCGV600R802C01B03D035SP01
GK / GKM / RM: VCGV600R860C03B038SP09
Equipment without alarm, but the telnet MCU address display port 23 open failed, unable to connect.
1. check the software version, matching, there is no problem;
2. with the Bureau network maintenance staff to communicate, make sure that port 23 is cut off by the firewall can not lead to telnet;
3. In the case of a serial line, using HyperTerminal serial cable landing MCU, no need to select landing due to the serial port, using only selected baud rate (9600);
4. also with the Bureau network maintenance personnel to communicate on the firewall to open port 23 to telnet login.
customer network may for security reasons, all ports with a firewall to ban it.