ADC HMS-318, T1MF2S04RA, LTPH-UM-1261-01 user manual J27, RS-232/X.25 Remote Management Ports

Chapter 1: Product Description December 20, 2004

RS-232/X.25 REMOTE MANAGEMENT PORTS

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 1-12lists the pin connections for the OS communications port connector, and Table 1-4 on page 1-13lists the pin connections for the AUX communications port connector.

1 3-1 2 61 R1

J27

		50		2 6	1		25
10 BA SE -2		AUX RS 232 DTE PO RT		1	26		5 0
	10 BA SE -T	2 5	CO PA IR 1			CO PA IR 2

50	26	1	2	3	4	5	1	25
OS RS 232 P ORT								50
25	1	-4 8VA -4 8V B BAT RTN				FGND	26
S PA N PAIR 1		FUS E FUS E			P INS 3 & 4			S PA N PAIR 2
		15 A MA X 15 A MA X MUS T B E BRI DGE D

J26

Figure 1-9. HMS-318 List 3 Shelf RS-232/X.25 Remote Management Ports

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.

Table 1-3. J26 – RS-232/X.25 Management Port (DTE)

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

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