Some more advanced and obscure information, that may still come in handy sometimes.  Unless otherwise noted, this advanced information applies to all Pathports.

Pathport DMX Output Maximum
MARK BEFORE BREAK 2us
BREAK 90us
MARK AFTER BREAK 48us
INTERBYTE TIME 0us
BREAK TO BREAK 22839
UPDATE RATE 44Hz

 

Pathport DMX Output Fast
MARK BEFORE BREAK 90us
BREAK 156us
MARK AFTER BREAK 48us
INTERBYTE TIME 4us
BREAK TO BREAK 22839
UPDATE RATE 40Hz

 

Pathport DMX Output Medium
MARK BEFORE BREAK 170us
BREAK 184us
MARK AFTER BREAK 75us
INTERBYTE TIME 8us
BREAK TO BREAK 27205
UPDATE RATE 36Hz

 

Pathport DMX Output Slow
MARK BEFORE BREAK 355us
BREAK 224us
MARK AFTER BREAK 102us
INTERBYTE TIME 16us
BREAK TO BREAK 31461 
UPDATE RATE 31Hz

Pathports shipped since 2011 should properly announce their Power-over-Ethernet rating Class to the Ethernet switch.  Pathports shipped prior to 2011 will appear as Class 0 devices but their actual power consumption will be the same as shown below.

All 1-port and 2-port nodes (6101/6102 Uno, 6151/6152 Portable Uno, 1011/1012 Pathport eDIN, 6201/6202/6203 C-Series Pathport, 6225 D-Series Pathport):

Class 1 PoE device, consuming no more than 4W of power per device.

All 4-port nodes (6311/6312/6314 Quattro, 1014 Pathport eDIN):

Class 2 PoE device, consuming no more than 8W of power per device.

Pathway does not make any Class 3 PoE devices.

Octo 8-port nodes (6401, 6402, 6403, 6406, 6407) will consume no more than 42 watts when connected to a mains supply.

All consumption figures assume the node is fully loaded, i.e. generating DMX on all ports and that DMX levels are constantly changing.

Large Pathport networks typically have a more sophisticated network infrastructure.  Here are some important configuration considerations.

WARNING:  These notes are for the use of experienced network support personnel only.  Mis-configuration of network components can result in outages or a totally non-functioning network.

The Pathport Protocol requires a network infrastructure that provides support for high-bandwidth, multicast UDP traffic.  Pathport traffic consists of UDP unicast data, as well as data on 3 different multicast groups.  All traffic is sent to UDP port 3792.

The 3 multicast groups used are:

239.255.237.1
239.255.237.2
239.255.237.255

Data throughput is essential, as data rates can reach greater than 700Kbits/second from each node on the system.  Node counts can reach 80-100 in larger systems.  Traffic is typically bursty and large spikes can often occur during times of heavy use.

It is highly recommended that all traffic management features be disabled on all switches with Pathport nodes connected, especially those related to managing broadcast storms.  Typical spikes in Pathport traffic can erroneously trigger broadcast storm management, causing undesirable results.  If storm control cannot be disabled, it is important that the threshold be adjustable to a packet rate higher than 150 packets per second, per Pathport node on the system.

All features related to IGMP must be properly configured as the Pathport protocol relies heavily on multicast technology.  Properly configured IGMP features can be an advantage as these can allow increased usage of the network infrastructure for non-Pathport applications.  Conversely improperly configured IGMP features can completely disable the Pathport network. Features like "IGMP snooping" and "Multicast Filtering" should be enabled only by qualified personnel.