Technical Manual

Preliminary Release

mode forwards all packets (known as promiscuous packet forwarding mode). This mode

is only recommended for small systems and testing. The recommended mode is

fm=1<CR> (host mode forwarding). In this mode a master radio will only forward

packets with a tabulated host source MAC address. A remote radio in host forwarding

mode only forwards packets with a tabulated host destination MAC address. Up to 16

addresses can be stored in the 2788 remote or master radio. For additional flooding

protection, additional filtering can be configured to perform RTU MAC filtering also. The

host 2788 radio can maintain a table of up to 512 RTU MAC addresses. Each remote

2788 radio can maintain a table of up to 2 RTU MAC addresses. Refer to the command

summary for entering and reading RTU and host MAC addresses.

10. When using host forwarding (fm=0 or fm=1) on either the master or remote 2788 radio,

determine the host MAC Ethernet address and enter it in the host table using the

command: host[n]=##-##-##-##-##-##<CR>, where n is a lower case hexadecimal

number 0,1,2,3,4,5,6,7,8,9,a,b,c,d,e, or f.

Up to 16 host MAC addresses may be stored in the host table memory. Each MAC

address contains 6 bytes, in lower case hexadecimal, with hyphen separators between

individual bytes. Enter hosttable<CR> to display the host table.

11. When using master RTU forwarding (fm=0 or fm=2), the master 2788 radio (om=1) must

contain a list of all RTU MAC addresses (up to 512). Enter an RTU address using the

following command: rtu[abc]=##-##-##-##-##-##<CR>, where abc is a lower case

hexadecimal number from 000 to 1ff (0 to 511 decimal). Enter rtutable<CR> to display

the RTU table on a 2788 radio configured as a master (om=1).

12. When using remote RTU forwarding (fm=0 or fm=2), the remote 2788 radio (om=0)

contains a list of up to 2 RTU MAC addresses. These addresses correspond to the RTUs

connected to that particular remote 2788 radio. The first RTU MAC is entered with the

following command: rtu0=##-##-##-##-##-##<CR>. The second (if any) RTU MAC address

is entered with the following command: rtu1=##-##-##-##-##-##<CR>. These two MAC

addresses are displayed in the regular status menu on a 2788 radio configured as a

remote (om=0).

13. Access to the 2788 can be restricted to personnel knowing an id and password. To

enable this password protection, enter the following command: ep=1<CR>. The id is set

using: id=### . . . ###<CR>, where the id is up to 16 characters and is case sensitive. The

password is set using: pw=### . . . ###<CR>, where the password is up to 16 characters

and is case sensitive. The default id is admin and the default password is password.

Once a session is completed, the user logs out using the log out command: lo<CR>.

Should the user forget to log out, it will automatically log out due to user keyboard

inactivity after the lgt time. Should the password and/or id be forgotten, the factory

default can be restored by removing the 2788 cover and pressing the push button. (See

Fig. 3) The push button also restores the original defaults for the IP address, subnet

mask, and gateway. To disable password protection, either press the push button or

enter ep=0<CR>.