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ACCULINK 316x DSU/CSU
3-52 December 1996 3160-A2-GB22-10
Selecting the Shared
Communication Port
Communication
between the Model 3161 DSU/CSUs
in the 3000 Series Carrier and an external PC (attached
either locally or through an external modem) occurs
through a shared communication (COM) port (refer to the
COMSPHERE 3000 Series Carrier Installation Manual
for cabling information). Unlike standalone Models
3160/3164 DSU/CSUs, the Model 3161 DSU/CSUs do
not have a dedicated COM port for external access.
Therefore, one circuit card in the carrier must be selected
as the Master Communication Unit, which provides the
COM port for all circuit cards in the carrier
. Once
configured as such, the Master Communication Unit
differs from circuit cards in the carrier because it now has
COM port configuration options that can be selected.
These options are used to configure Port 2 on the
Auxiliary Backplane as the COM port for the carrier.
NOTE
If a Model 3161 DSU/CSU is
configured as the Master
Communication Unit, Port 2
cannot be used as a data port.
To
select the Master Communication Unit for the
carrier,
1.
Use the Select button on the SDCP to choose the
desired unit in the carrier (see Selecting a
Model 3161 DSU/CSU in Chapter 2, Installation).
2. Press F3 to select Config from the top-level menu
screen.
F1
1:01 DS
U E
SF
Stat Test Cnfig
F2
F3
3. Select the configuration option set to be copied
into the Edit area by using the appropriate
function key
. Use the scroll keys, if necessary
.
F1
Load from:
Activ Cust Fact1
F2
F3
4. Press F1 to select Edit.
F1
Choose Funct:
Edit Save
F2
F3
5. From
the Edit screen, press the
key until the
User selection appears on the screen.
F1
Edit:
DTE Port Net
F2
F3
6.
Press F3 to select User
.
F1
Edit:
Chan Gen User
F2
F3
7. Press F1 (Next) until the MasterCom
configuration option appears on the screen.
F1
Self–Test:Enab
Next Enab Disab
F2
F3