Metrodata FM4900, User Manual

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CONFIGURING THE FM4900
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6. 10 Unit Set-up Checklist
FM4900 DSU’s are used in pairs, one at each end of a WAN link. This section acts as a
checklist for setting up each unit before establishing a valid configuration for a particular
application. It assumes that you have already connected the unit as required, and logged in
with the Operator password. The procedure below should be carried out on
both units.
Step 1: Set Terminal
Set your terminal’s communication parameters to the FM4900’s V.24 default values, then
switch on power to the FM4900.
Step 2: V.24 Set-up Menu
Establish the communication parameters so that the FM4900 and the terminal are using the
same settings. Set the terminal parameters at first to the default values, which are listed in
Section 5.4.
Change the FM4900’s BAUD RATE, PARITY, DATA BITS and STOP bits if necessary, then
select LOAD NEW CONFIG.
If you have changed any of the default settings, you will now need to update them on the
terminal, so that the FM4900 and the terminal are still on identical settings.
Step 3: Local Node - General Set-up Menu
Check the current time and date, and change them if necessary as already described. Check
the “
[nodename]” of the local FM4900, and change it if necessary. Check the Operator
Password, and change it if necessary.
S tep 4: WAN Set-Up Menu
From the MAIN SET-UP menu, select the WAN Set-up option and set the FRAMING,
TIMING, DATALINK (if in Framed mode) and AIS DETECTION (if in Unframed mode)
parameters as appropriate.
FRAMING : Two options are available - G.751 FRAMED or UNFRAMED operation. Both
units should be set to the same configuration. When UNFRAMED mode is selected an extra
field appears in the WAN SET-UP menu which allows AIS detection to be set to ENABLED
or DISABLED. The AIS detector should always remain enabled under normal datacomms
conditions, and should only be disabled when there is a very low zero density in the traffic.
TIMING: We recommend that one FM4900 is set to INTERNAL timing and the other is set
to LOOP timing. The units will operate with both set to Internal timing. The units may work if
both are set to LOOP timing but this is not recommended.
S tep 5: DTE Set-Up Menu
From the MAIN SET-UP menu, select the DTE Set-up option and set the parameters as
appropriate.
Note: After steps 1 to 4 have been successfully carried out, basic operation of the link should
now be possible.