The type of user who locks system configuration.
Options:
1. nooperation(-1) -default type of the system
2. nms(1) -the user who access through the NMS
3. series(2) -the user who access through the serial interface
4. telnet(3) -the user who access through telnet
5. web(4) -the user who access through the web user interface
6. xml(5) -the user who access through the XML interface
7. ssh(6) -the user who access through SSH
8. netconf(7) -the user who access through NETCONF