ADC HRM-238 L1 - Manual (Page 17)

LTPH-UM-1237-04 Installation
HRM-238 List 1 July 21, 2004 9
Connect to a LAN or Interconnect Shelves
Use the BNC connector ( Figure 9 ) when required for access using a LAN or for interconnecting multiple shelves.
Consult the appropriate user manual for the HMU-319 management unit and for the software used in the
application. See
Table 4 for information on BNC connector J1 and J3.
Figure 9. Using BNC Connector
Connect to a Computer, Terminal, or Modem
The AUX and OS connectors ( Figure 10 ) are DB-25, configured as Data Terminal Equipment (DTE). There is
one AUX and one OS connector for each of the two management unit slots. Use these connectors for a direct
connection (straight-through) with devices configured Data Communication Equipment (DCE) such as modems,
X.25 Packet Assembler/Disassemblers (PADs), or LAN terminal servers.
Figure 10. AUX or OS Connectors
Table 4. BNC Connector J1 and J3
Shield LAN-, CDS
Center LAN+
BNC connector (J1) BNC connector (J3)
H0549-A
AUX port DB-25
connector (P5)
OS port DB-25
connector (P4)
OS port DB-25
connector (P2)
AUX port DB-25
connector (P3)
H0550-A