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ISDN-based "Leased Line" services

In the older Telstra Microlink or Macrolink ISDN product, one or more B channels may be dedicated as a "leased line" (or "nailed up") point-to-point circuit or service (SPC). These services are (were?) very commonly used to interconnect routers in the Internet. Such links are called "semi permanent" because they are not a "fixed" physical link within the ISDN network but a permanent call set up by the ISDN terminal equipment.
 
In its more recent OnRamp products, Telstra currently offers its OnRamp Xpress service. This is similar to a SPC, but charging is significantly more complicated! OnRamp Xpress charging is based on the idea of a monthly capped charge. Example:
 
A business purchases an OnRamp Xpress service to connect permanently to an ISP, or perhaps to another local business:
 
On Ramp 2 $50 per month
Xpress 1 Plan Fee $90 per month
Xpress 1 limited cap $135 per month
Total Xpress charges $275 per month

 


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