Flowire clusters

From Zenitel Wiki

Example of Flowire Clusters

This article describes special considerations that must be considered when having multiple Flowire Clusters in an installation.

Power Supply

When using the Flowire model FCDC-3, it is possible to use the same Power Supply Unit (PSU) to power multiple Flowire clusters.

Note icon Power must be applied to only one of the Flowire units in the cluster.

Warning icon When using FCDC-1 or FCDC-2, each cluster must have its own Power Supply Unit (PSU). Failing to do so will cause major operational issues.

Cluster separation

When there are several Flowire clusters in an installation, the different clusters must be separated to avoid crosstalk between the clusters. When crosstalk is present, a Flowire unit on one cluster might "jump over" to the other cluster, causing errors in the communication, and an unstable system. Cluster separation is achieved by using Network Password (NMK).

All Flowire units within the same cluster must have the same Network Password.

Setting the NMK

The NMK is set from the web interface of the Flowire unit. Find the IP address of the Flowire unit, and log on using a standard web browser. Default user/password: admin/alphaadmin.

To set a new NMK select Advanced Setup > HomePlug > Network password:

Setting a new NMK password in FCDC3

The NMK Password is case sensitive, and can be up to 32 characters long.

To set a new NMK in FCDC1 or FCDC2, select the button "Upgrade form", and enter a new Flowire NMK:

Setting a new NMK in FCDC1/2

It is good practice to label the Flowire unit with the new NMK.

The default NMK is HomePlugAV0123.

In the FCDC-1 and FCDC-2 the NMK Password can be up to 64 characters long.

Setting the NMK in an installation with TFIX stations

A typical TFIX installation

The TFIX station is an explosion proof station with an embedded Flowire unit.

If there is a need to change the NMK password, you must change it in the TFIX stations first, and finally change it in the central Flowire unit.

If there is no DHCP server present, all Flowire units will by default have the IP address. The first step is to isolate the central Flowire by disconnect the line to the TFIX stations, and power off any other Flowire units in the installation. Access the web interface of the Flowire unit via address Then change its IP address to something different, say At this stage, leave the NMK Password to the default value. Then connect one TFIX to the line, and access it at Change the IP address to something not default, say, and access it again on the new address. Now you can change the NMK Password on the TFIX station. The station will now temporarily loose connection with the central Flowire unit.

Now connect the second TFIX station to the line, access it by, and follow the same procedure. Change IP address first, then the NMK Password. Give it the same NMK password as the first TFIX station. Do the same with the remaining TFIX stations. Finally log on to the central Flowire unit (e.g. and change the NMK Password also here. Now the communication should be up and running with all TFIX stations.

The NMK password can be restored to its default "HomePlugAV0123" by performing a factory default procedure on the TFIX station.

IGMP settings

In Flowire clusters with multiple endpoints, IGMP settings may need to be set for correct operation.

Set CCo

For optimal availability it is recommended to configure CCo mode.

Note icon In mixed cluster with both FCDC3 and FCDC1/2, FCDC1/2 should be set as "Not CCo", and one FCDC3 must be set as "CCo".

Related articles