Cisco DNCS System Release 2.8.1 3.8.1 4.3.1 User Guide

Use the following fields when you manage basic parameters for a BFS QAM modulator.

Headend Name

The headend in which this BFS QAM modulator resides.

QAM Name

The name you will use to identify this BFS QAM modulator.

You can use up to 15 alphanumeric characters (for example, HE1BFSQAM). 

Be sure to use a name that is consistent with the naming scheme used on your
network map.

IP Address

The IP address for this QAM modulator. 

Be careful to properly place the dots (.) between numbers.

Tip: When entering IP addresses, type a period to move from octet to octet.
Do 

not

 press the Tab key to move from octet to octet; pressing the Tab key

moves the cursor to the next field on the window.

Modulation Type

The type of modulation standard this modulator uses.

Example: If this is a 256 QAM modulator that uses ITU B modulation, select ITU
J.83 Annex B (6 MHz).

MAC Address

The MAC address for this QAM modulator.

Subnet Mask

The subnet mask where this QAM modulator resides.

If your system uses a standard network configuration, type 255.255.255.0,
otherwise type the subnet mask as assigned by your system administrator.

Default Gateway

If your system uses a default gateway, enter the IP address of the default
gateway.

Using a default gateway speeds up the reconnection process that occurs after a
BFS QAM modulator is rebooted.

Allow SI

Determines whether the QAM carries SI (system information), which defines it as
a Distinguished QAM):



Set to yes (selected) if this BFS QAM modulator will also function as a

Distinguished QAM.



Set to no (unselected) if this BFS QAM is being used in an RCS. SI

information is carried by QPSK modulators in an RCS.

Input Port

Defines the interface that connects to this QAM modulator:



If the BFS QAM Modulator connects to a BFS BIG, click the SWIF option

to select the type of card sending BFS data from the BFS BIG to this
QAM modulator.



If the BFS QAM Modulator connects directly to the DNCS, click the ASI

option to indicate the type of card that sends BFS data from the DNCS
to this QAM modulator. Select this option if you are using the QAM
modulator with an RCS.

INPUT Transport
Stream

The system sets this value automatically when the corresponding transport
stream ID is set up in the BFS BIG or ASI card and the connection is established
on the Connectivity tab.

RF OUT Fields

Modulation - The type of
modulation this QAM modulator

Select the type of modulation this QAM
modulator uses. For example, if this modulator