Cambium Networks cnReach N500 Handleiding (253 Pagina's)

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cnReach N500 User Guide System Configuration

phn-4980_001v004 August 2019)

2-44

Seamless Serial Service

Seamless serial is a mechanism unique to cnReach allowing for serial-only to serial-only communications

within a subset of a sector (AP to a subset of it’s EPs) while sharing that same sector’s air interfaces for

Ethernet traffic. Using seamless serial, the administrator defines a series of seamless serial groups.

Then when a serial service is set up it can be assigned to a seamless serial group. All serial ports within

that seamless serial group now act as one joined serial port.

Seamless Serial allows you to use a hybrid network with some endpoints supporting full Ethernet

bridging and routing while other endpoints are serial only (and possibly lowpower serial.) A major

benefit of Seamless Serial is multi-point efficiency — you can broadcast the same data to a multi-point

network without duplicating the data across multiple TCP sessions. A single Seamless Serial network

requires a minimum of one AP and one EP. Seamless serial also significantly reduced overhead for

transporting serial data over the air by eliminating Ethernet header and TCP/IP header, replacing these

overheads with a radio group ID. The radio group ID should be the same for all radios sharing the same

serial service.

Seamless serial traffic is sent at higher priority than Ethernet traffic as one of the main goals of seamless

serial is to reduce overhead of TCP/IP communications, increasing efficiency and reducing jitter for

serial services that are time/jitter sensitive.

To configure seamless serial, on a radio, configure a regular serial service TCP terminal client with the

remote IP address as 127.0.0.1 and remote port number the same as the port number configured on the

seamless serial map. For example, 5000 as shown on the screenshot of the seamless serial map. The

following is a screenshot showing configuration of a serial service for seamless serial.

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