A recommendation for standard-compliant structured cabling in passive optical LANs

In an entry on its Standards Informant website, Siemon points out standards call for two permanent links at each work area.

May 12th, 2014

In a recent post to its Standards Informant website, Siemon provides a recommendation to provide at least two permanent links to each workstation in a passive optical network (PON)/passive optical LAN (POL) application. And despite that the “O” in PON/POL stands for “optical,” Siemon says one of those permanent links should be twisted-pair copper. Siemon is a member of the Association for Passive Optical LAN.

“To ensure compliance with ANSI/TIA-568-C.1 and ISO/IEC 11801 Edition 2.2, a minimum of two permanent links shall be provided for each work area,” the Standards Informant post says. That statement is immediately followed by the following—in bold type: “For an infrastructure anticipated to support PON technology, Siemon recommends that a minimum of one 2-fiber single-mode permanent link supported by duplex SC or LC connectivity and one category 6A or higher balanced twisted-pair permanent link be provided at each work area.”

Having twisted-pair cabling at each workstation supports device powering through technology such as Power over Ethernet, among other benefits, Siemon points out. “While PON equipment may be connected using point-to-point cabling, the flexibility of the system is greatly enhanced if the network is deployed over a TIA and ISO/IEC-compliant structured cabling system,” the post also says.

The entry includes a schematic of Siemon’s recommended minimum backbone and horizontal cabling topology for PON applications. You can read the full entry on the Standards Informant website here.

More in Standards