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Acuity offers the full range of PSTN lines, from standard telephone lines, through to ISDN circuits, and for customers with IP telephony systems, Acuity provides SIP trunks.

PSTN Lines

PSTN lines can be provided with a number of "care levels" (fault-to-fix times), depending on the individual requirements. They can be purchased as single lines or groups of lines, along with single numbers or DDI ranges. Other uses include alarm lines, PDQ lines, and telemetry services.

ISDN

ISDN services can still be purchased from Acuity, although BT has announced end-of-life for the product.