Cisco DNCS System Release 2.7 3.7 4.2 Technical References
6
4011319 Rev C
Configure Unencrypted Transport Streams
Before You Begin
Consider the following factors as you complete the procedures in this section:
Consider the following factors as you complete the procedures in this section:
You must configure the QAM using the Set Up QAM window on the DNCS. You
must do this before the QAM is able to boot.
Note: In earlier software releases, you were required to use the /etc/bootptab
file to configure the QAM. This is no longer required. If the /etc/bootptab file
contains any QAMs, you should delete them from the /etc/bootptab file.
Note: In earlier software releases, you were required to use the /etc/bootptab
file to configure the QAM. This is no longer required. If the /etc/bootptab file
contains any QAMs, you should delete them from the /etc/bootptab file.
This procedure allows the QAM to pass everything that it receives on the ASI
input through to the RF output.
Because the DNCS will not be used to build sessions, be careful that the data rate
on the ASI input to the QAM does not exceed the output capacity of the QAM
(27 Mbps for 64 QAM or 38 Mbps for 256 QAM).
Because the DNCS will not be used to build sessions, be careful that the data rate
on the ASI input to the QAM does not exceed the output capacity of the QAM
(27 Mbps for 64 QAM or 38 Mbps for 256 QAM).
Beginning with CAQAM 2.5.1 and MQAM 2.6.11, the passthru setting is stored
in non-volatile memory (NVM). If you are using CAQAM 2.5.1 or MQAM 2.6.11,
you do not have to re-enable passthru mode whenever the QAM loses power.
However, earlier versions of the QAM software did not store the passthru setting
in NVM. Because this setting is now persistent through reboots, an
uninterruptible power supply is no longer required.
In order to set up non-Cisco digital sources, you must know the program numbers
for content passed through the QAM.
for content passed through the QAM.
Set Up the Clear QAM
Complete this process to set up the clear QAM.
1 Configure the QAM on the DNCS as if it were a standard QAM.
Complete this process to set up the clear QAM.
1 Configure the QAM on the DNCS as if it were a standard QAM.
Important:
Do not assign this QAM to a service group. You cannot use this QAM to set
up broadcast or VOD sessions. The QAM will not allow you to set up
sessions when it is in passthru mode.
up broadcast or VOD sessions. The QAM will not allow you to set up
sessions when it is in passthru mode.
Be sure that you record the frequency and modulation type of this QAM for
later use. You will need this information in Setting Up Non-Cisco Digital
Sources (on page 7).
later use. You will need this information in Setting Up Non-Cisco Digital
Sources (on page 7).
2 Boot the QAM so it can fully load the appropriate software and receive
provisioning information from the DNCS.
3 Connect a PC terminal to the craft port on the back panel of the QAM being
configured. Use a standard RS-232 cable with a DB9 connector.