Wegener Communications 6420 - Manual (Page 71)

iPump 6420 User’s Manual
www.wegener.com 800070-01 Rev B Chapter 3, Page 67
3.1.6. SNMP Status
Simple Network Management Protocol (SNMP) is used in network management systems to
monitor network-attached devices for conditions that warrant administrative attention. It consists
of a set of standards for network management, including an Application Layer protocol, a
database schema, and a set of data objects. SNMP exposes management data in the form of
variables on the managed systems, which describe the system configuration. These variables can
then be queried (and sometimes set) by managing applications. In the Wegener implementation
of SNMP, variables will be available for query only.
See Appendix 2 for the root and PCMI MIBs.
The user controls affecting the Terminal interface are listed:
1. Set the system MIB values of sysName and sysLocation via SNMP.
2. Allow or disallow HTTP (web) access. Set by Compel or the factory.
3. Set the Community String. Set at the factory.
3.1.7. PIO Inputs
The local PIO inputs, 1 to 7 may be assigned to Compel Triggers, unfortunately numbered 0
to 6. To assign Triggers, see the discussion on Triggers above in Section 3.1.1. To view the
settings, see the Scheduled Events local web page (Figure 3-11).
3.1.8. Automatic Restoral of Audio
Loss-of-Signal
After loss of a valid MPEG Transport, or more precisely, when an i6420 audio port loses its
audio stream, the unit can supply the end listener some relief from the silence that will appear. If
the loss is continuous for a user-set interval, then a specific user-created playlist, always with the
standard name ‘LOS’ will start to play on that audio port. If the LOS playlist does not exist, then
no Loss-of-Signal restoral will be attempted. Of course, if the entire Transport is lost, then all
audio ports, whose assignments were not OFF, will play LOS. The LOS playlist will play to
completion and then repeat indefinitely for all applicable audio ports, until the expected audio
streams are restored, the audio assignments changed, or the unit is reset.
The user controls affecting the Loss-of-Signal feature are listed:
1. LOS timeout. Set at the factory.
Auto Recovery Modes
After the iPump6420 unit loses its source of MPEG Transport from an RF carrier, it will
repeatedly attempt to re-acquire that carrier, and relock to the Transport. In the event that this
process exceeds some user-set timeout, then the unit will enter an Auto-Recovery mode called
Services Recovery. Also, if the Compel network control stream is lost, when it is required, then
likewise, the unit will enter a similar Auto-Recovery mode called Network Recovery. In each
case, the unit will use an alternate set of carrier Presets in order to attempt to replace the
“missing” item, whether the carrier (and all the audio streams) or the Compel network control
stream. Each 30 seconds, the unit will attempt to get carrier acquisition on another of the official
carrier Presets (see Section 3.2.1). If successful on carrier acquisition while in Services
Recovery, then the search is declared a success. If in Network Recovery, it will wait another