ADC HiGain HMS-318 - Manual (Page 24)

Chapter 1: Product Description December 20, 2004
1-12 LTPH-UM-1261-01
RS-232/X.25 R EMOTE M ANAGEMENT P ORTS
Two EIA RS-232 communications ports, J26 (labeled OS RS232 PORT) and J27 (labeled AUX RS232 PORT),
located on the HMS-318 List 3 shelf rear panel (see
Figure 1-9 on page 12 ), provide optional OS and AUX
management interfaces for connection to a HiGain system. Table 1-3 on page 1-12 lists the pin connections for the
OS communications port connector, and Table 1-4 on page 1-13 lists the pin connections for the AUX
communications port connector.
Figure 1-9. HMS-318 List 3 Shelf RS-232/X.25 Remote Management Ports
Table 1-3. J26 – RS-232/X.25 Management Port (DTE)
Note: The HMU-319 requires that Data Set Ready (DSR) be asserted by the connected Data
Communications Equipment (DCE) in order to establish communications on this port. In the HMU/HLU
configuration, the HMU-319 always asserts Data Terminal Ready (DTR) on this port.
Pin No. Signal Direction
1 Shield —
2 Transmit Data (TD) Out
3 Receive Data (RD) In
4 Request to Send (RTS) Out
5 Clear to Send (CTS) In
6 Data Set Ready (DSR) In
7 Ground (GND) —
15 TCLK In
17 RCLK In
20 Data Terminal Ready (DTR) Out
24 TCLK In
J27
J26
OS RS 2 32 P ORT
AUX RS 23 2 DTE PO RT
13
-12
6 1R
1
1 0 BA SE -T 1 0 BA SE -2
-4 8VA -4 8V B BAT RT N
1 2 3 4 5
F G ND F US E F US E P INS 3 & 4 MUS T B E BR I DGE D 15 A MA X 15 A MA X
S PA N PAIR 1
2 5 1
2 6 5 0
CO PA IR 1 2 5 1
2 6 5 0
CO PA IR 2
2 5 1
2 6 5 0
S PA N PAIR 2
2 5 1
2 6 5 0