Comtech EF Data CRS-500 - Manual (Page 166)

CRS-500 1:N Redundancy System Revision 2
Serial-based Remote Product Management MN-CRS500
9–6
9.4.2.2 Target Address
While up to 9,999 devices can be uniquely addressed, connection to the CRS-500 imposes some basic limitations:
• In EIA-232 applications, the Switch address is fixed at 0000.
• In EIA-485 applications, the Switch may be set to an address of 1000, 3000, 5000 or 7000. This allows up to four Switches to be
connected on the same bus.
• The 11 modems that may be connected to the Switch may be accessed for remote monitor & control through the Switch via
virtual addresses. The details of this addressing scheme is shown in Appendix C. ADDRESSING SCHEME INFORMATION. Valid
remote commands and queries that can be sent to the modems via the Switch depend upon the modem protocol and the
installed options. Consult the appropriate modem Installation and Operation Manual for further information.
Note that, regardless of the Switch COMs being set up for either EIA-232 or EIA-485 mode, the Switch communicates with the modems
via Telnet.
The Controller sends a packet with the address of a Target - the destination of the packet. When the Target responds, the address used
is the same address, to indicate to the Controller the source of the packet. The Controller does not have its own address.
The Comtech SatMac application software (Version 3.6 or higher) can monitor and control a CRS-500 1:N Redundancy System. The
address scheme details are shown in Appendix C. ADDRESSING SCHEME INFORMATION.
There also are address restrictions for distant-end modems (being accessed by EDMAC) and Comtech transceivers, connected either
locally or at the distant-end of a link. See Appendix C. ADDRESSING SCHEME INFORMATION for detailed addressing information and
diagrams.
9.4.2.3 Address Delimiter
This is the “forward slash” character '/ ' (ASCII code 47).