Abstract: Methods, systems, and apparatus for correlating communications measurements are disclosed. In one aspect, a communications measurement of a maintenance entity (ME) is received. The communications measurement is stored and correlated with a maintenance entity group (MEG) identifier and an ME identifier received with the communications measurement. The stored communications measurement is registered with one or more previously received communications measurements. Each previously received communications measurement is associated with an availability indicator corresponding to an availability of the ME at a time the particular communications measurement was obtained. An availability of the ME during a given time interval is determined based on availability indicators of consecutive communications measurements for the ME.

Abstract: Methods, systems, and apparatus for correlating communications measurements are disclosed. In one aspect, a communications measurement of a maintenance entity (ME) is received. The communications measurement is stored and correlated with a maintenance entity group (MEG) identifier and an ME identifier received with the communications measurement. The stored communications measurement is registered with one or more previously received communications measurements. Each previously received communications measurement is associated with an availability indicator corresponding to an availability of the ME at a time the particular communications measurement was obtained. An availability of the ME during a given time interval is determined based on availability indicators of consecutive communications measurements for the ME.

Abstract: Methods, systems, and apparatus for diagnosing and optimizing an Internet Protocol television (IPTV) network are disclosed. In one aspect a method includes receiving a network address of a device; detecting a network topology associated with the device based on the network address of the device; identifying a configuration parameter setting associated with the network topology that is outside of a range of acceptable configuration parameter settings for the network topology; and providing output specifying the configuration parameter setting that is outside of the range of acceptable configuration parameter settings.

Abstract: Methods, systems, and apparatus for processing stream messages are disclosed. In one aspect, a downstream message formatted according to an asymmetric communication protocol is received over a downstream Virtual Local Area Network (VLAN). An upstream message is generated in response to receiving the downstream message. The downstream message is transmitted on the downstream VLAN. The upstream message is transmitted on an upstream VLAN that is different than the downstream multicast VLAN.

Abstract: Methods, systems, and apparatus for selecting frame loss measures are disclosed. In one aspect, a Synthetic Loss Measurement (SLM) report for a given interval for a network managed entity that includes at least two network nodes is received. A Loss Measurement Message (LMM) report for a given interval for the network managed entity is received. For the given interval and from the SLM and LMM reports, a reporting measurement for the network managed entity is selected based, at least in part, on a frame rate of data transmitted over the network managed entity during the given interval or an occurrence of a specified network event during the given interval. Frame loss information for the given interval for the network managed entity based on the selected reporting measurement is reported.

Abstract: Methods, systems, and apparatus for selecting frame loss measures are disclosed. In one aspect, a Synthetic Loss Measurement (SLM) report for a given interval for a network managed entity that includes at least two network nodes is received. A Loss Measurement Message (LMM) report for a given interval for the network managed entity is received. For the given interval and from the SLM and LMM reports, a reporting measurement for the network managed entity is selected based, at least in part, on a frame rate of data transmitted over the network managed entity during the given interval or an occurrence of a specified network event during the given interval. Frame loss information for the given interval for the network managed entity based on the selected reporting measurement is reported.

Abstract: Methods, systems, and apparatus for processing stream messages are disclosed. In one aspect, a downstream message formatted according to an asymmetric communication protocol is received over a downstream Virtual Local Area Network (VLAN). An upstream message is generated in response to receiving the downstream message. The downstream message is transmitted on the downstream VLAN. The upstream message is transmitted on an upstream VLAN that is different than the downstream multicast VLAN.

Abstract: Methods, systems, and apparatus for diagnosing and optimizing an Internet Protocol television (IPTV) network are disclosed. In one aspect a method includes receiving a network address of a device; detecting a network topology associated with the device based on the network address of the device; identifying a configuration parameter setting associated with the network topology that is outside of a range of acceptable configuration parameter settings for the network topology; and providing output specifying the configuration parameter setting that is outside of the range of acceptable configuration parameter settings.