LISTING SETUP FOR RIO LDM

IO # 11

	FECO:	IO # 11
	MODIFICATION NO:	N/A
	PRODUCT:	SPECIALIX RIO LDM
	SUB-ASSEMBLY:	N/A
	ESTIMATED MAN HOURS:	N/A
	CLASS OF CHANGE:	MANDATORY
	REASON FOR CHANGE:	LISTING SETUP FOR RIO LDM
	RELATED FECO/AB	AB 169

RIO LDM (Long Distance Module)

1 The RIO Long Distance Module (LDM) enables the extension of the RIO system via cable leased line or the
telecommunications system.

Connections can be made over thousands of miles using synchronous (X.21/X.21bis) or asynchronous (RS232/RS422)
modems.

2 The LDM is specifically designed for use on high-speed synchronous connections. Slower, asynchronous speeds are
supported but are only recommended for applications where low throughput is acceptable.

3 The LDM consists of two Long Distance Units (LDUs). One LDU connects your local host card or RTA to a Comms
unit, the other connects the remote RTA to a Comms unit.

The speed and protocol are configured using a dial on the LDU. The Comms unit can be a modem or Line Driver, or
more likely with EDP customers a Kilostream NTU.

The LDM also supports a twisted-pair RS422 cable up to a distance of 1 km

4 RIO LDM CONNECTION

Line Driver/Modem/NTU

4.1

Line Driver/Modem/NTU

5 RIO Long Distance Unit (LDU)

5.1          The LDU consists of a converter box with two flying leads (see below). One is a metre-long RIO Link cable which
              plugs into your host card or RTA; the other is a serial cable with a DB25 connector which connects to yourComms
              unit or RS422 long-wire cable.

5.2

6 Installing an LDM Connection

6.1 Synchronous X21 connection for Kilostream connection, connect the LDU to the NTU by means of a cable Type FK

6.2 Asynchronous Long Wire Connection use cable type LM

6.3 Modem Connection for modem connection use cable type LN

6.4 Using a small screwdriver, set the rotary switch on each LDU to the required EDP setting:

7 for Long Wire A for Kilostream.

Switch Line Speed Transmission Connection

0 9600 Asynchronous Modem

1 19200 Asynchronous Modem

2 38400 Asynchronous Modem

3 RESERVED - -

4 RESERVED - -

5 78000 Asynchronous Long-wire

6 156250 Asynchronous Long-wire

7 312500 Asynchronous Long-wire

8 Ext Rx, Ext Tx Clk* Synchronous Modem

9 Ext Rx/Tx Clock* Synchronous X21bis

A Ext Rx/Tx Clock** Synchronous X21

B RESERVED - -

C 9600 Asynchronous Modem/Autodial

D 19200 Asynchronous Modem/Autodial

E 38400 Asynchronous Modem/Autodail

F RESERVED - -

*Transmit and receive clocks are separate inputs.

**One clock input provides both transmit and receive clocks.

6.5 Notes

Switches 3,4,B and F must not be selected.

For an Asynchronous modem, select switch setting 0,1 or 2. Select the fastest speed setting (2), unless operating in a noisy environment where a slower speed is advisable.

For synchronous modems, select switch setting 8.

If you are connecting the LDM to ISDN Terminal Adaptors, choose switch setting 9 or A (depending on your installation).

6.6

Speeds below 14.4 Kbit/s are not supported.

Modems should be configured to 8 data bits.

Flow control must be disabled

Command echo must be disabled

Display of results codes must be suppressed.

6.7 For Asynchronous modes:

Modems must support a minimum of V32bits

Modems must connect at a minimum speed of 9600 baud

Modems should be set to 8 data bits, 1 stop bit and no parity

Hardware flow control must be enabled

Command echo must be disabled

Display of result codes must be suppressed.

6.8 When the units (host Card/RTAs) at each end of the LDM connection are powered up, check that the Power LED on
each LDU is green

6.9 When using NTU modems ensure that the NTU modem is powered on and connected to the LDU before connecting the
LDU to your RIO system.

6.10      Once a connection has been established, some Asynchronous modems are able to negotiate a faster line speed on the
            telecommunications link. If you are using such modems, your RTAs will temporaily disconnect and then reconnect at
            the higher speed. This is, of course, to your advantage, and the fault status messages output to the console by the RIO
            configuration software can be ignored.

6.11 Terminals logged in when modems are disconnected or the line dropped will continue where they left off when the line is
reconnected.

7 Cabling

The pinouts of the DB25 connectors on the RS422 flying lead are as follows:

Pin Signal Name Direction

1 Chassis Chassis Ground -

2 TXD Transmit Data Output RS232

3 RXD Receive Data Input RS232

4 RTS* Request To Send Output RS232

5 CTS* Clear To Send Input RS232

6 N/C Not Connected -

7 GND Ground -

8 DCD* Data Carrier Detect Input RS232

9 DCD+ Data Carrier Detect Input RS422

10 RXD- Inverse RXD Input RS422

11 RXD+ Receive Data Input RS422

12 TXD- Inverse TXD Output RS422

13 TXD+ Transmit Data Output RS422

14 CTS- Inverse CTS Input RS422

15 TXC Transmit Clock Input RS422

16 CTS+ Clear To Send Input RS422

17 RXC Receive Clock Input RS422

18 RTS- Inverse RTS Output RS422

19 RTS+ Request To Send Output RS422

20 DTR* Data Terminal Ready Output RS422

21 DCD- Inverse DCD Input RS422

22 DTR+ Data Terminal Ready Output RS422

23 DTR- Inverse DTR Output RS422

24 RXC- Inverse RXC Input RS422

25 RXC+ Receive Clock Input RS422

*Active Low Signals.

7             The maunfacturer recommends that a maximum of two LDM are fitted to any one host.
                Also that no more than 16 ports are connected remotely via this method,
                i.e. 1 x RTA16 or 2 x RTA8. See AB169 for details.
                Different configurations will be encountered in the field.

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