F. Technical SpecificationsF-8 September 2002 9128-A2-GB20-80Table F-5. ISDN PRI DBM (Optional Feature) Technical SpecificationsSpecification CriteriaStandards Compliance ANSI T1.403 – 1989 (physical layer) and AT&T 62411Bellcore SR-NWT-002120, Issue 1 – May 1992ITU Q.921 – 1992 (link layer)ITU Q.931 – 1993 (network layer)TR-TSY-00860, ISDN Calling Number IdentificationServices – February 1989, and Supplement –June 1990Power Consumption 8 mA at 120 VACAverage power 1 watt (3.4 Btu per hour)Weight 0.15 lbs. 2.4 oz. (0.07 kg 68 grams)Switch Compatibility National ISDN-2 (NI-2), ATT 4ESS, or ATT 5ESSService Supported PRI, NI-2, ATT 4ESS custom, or ATT 5ESS custom(supporting up to 23 B-channels), with Circuit-SwitchedData capability.Framing Format D4, ESFCoding Format B8ZSLine Build-Out (LBO) 0.0 dB, –7.5 dB, –15 dB, –22.5 dBANSI PRM Selectable
