Identifying a node port that is experiencing ingress

A non-transitory computer-readable storage medium that stores one or more sequences of instructions for identifying a node port experiencing ingress, cause:

• an element receiving an indication that the ingress noise may be present in one or more upstream channels of a node;
• in response to receiving the indication, the element receiving upstream spectrum data describing the signal to noise (SNR) experienced by a Remote PHY Device (RPD) receiver of said one or more upstream channels for two or more different states in one or more of Radio Frequency (RF) attenuation and upstream port/node port coupling for the node;
• and
• the element processing said upstream spectrum data to deduce from which one or more node ports of the node the ingress noise originates.

An apparatus for identifying a node port experiencing ingress, comprising:

• one or more processors;
• and
• one or more non-transitory computer-readable storage mediums storing one or more sequences of instructions, which when executed, cause:
• an element receiving an indication that the ingress noise may be present in one or more upstream channels of a node;
• in response to receiving the indication, the element obtaining upstream spectrum data that describes an upstream spectrum received power over an interval of time having no transmissions carried by said one or more upstream channels for two or more different states in one or more of Radio Frequency (RF) attenuation and upstream port/node port coupling for the node;
• and
• the element processing said upstream spectrum data to deduce from which one or more node ports of the node the ingress noise originates.

An apparatus for identifying a node port experiencing ingress, comprising:

• one or more processors;
• and
• one or more non-transitory computer-readable storage mediums storing one or more sequences of instructions, which when executed, cause:
• an element receiving an indication that the ingress noise may be present in one or more upstream channels of a node;
• in response to receiving the indication, the element receiving upstream spectrum data describing the signal to noise (SNR) experienced by a Remote PHY Device (RPD) receiver of said one or more upstream channels for two or more different states in one or more of Radio Frequency (RF) attenuation and upstream port/node port coupling for the node;
• and
• the element processing said upstream spectrum data to deduce from which one or more node ports of the node the ingress noise originates.