Business

Northeast District HDSL Design rules


History Lesson:

The first version of business HDSL technology (approximately 10 years ago) was a 4-wire circuit designed to meet a 35dB insertion loss at 196Kz. This loss was calculated based on gauge of cable, environment (UG, buried or aerial), number of gauge changes and number of bridged taps. Generally speaking, the thought was that “Carrier Serving Area” criteria would suffice for an HDSL circuit (< 9kft of 26 gauge, non-loaded, bridged tap < 2.5kft, no bridged tap within 500’ of equipment).

Since that time, two new versions of HDSL technology have been introduced into the network.
HDSL2 is a 2-wire circuit originally designed to the same insertion loss criteria.
HDSL4 is a 4-wire circuit that will extend the loop and withstand a higher insertion loss.

Lots of rules have been issued since the inception of HDSL technology. Due to Failure Frequency concerns of the last few years, our staff has issued some more stringent de...