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F. Technical Specifications
9128-A2-GB20-80 September 2002
F-7
Table F-4. ISDN BRI DBM (Optional Feature) Technical Specifications
Specification Criteria
Standards Compliance ANSI T1.601 – 1992 (physical layer)
Bellcore SR-NWT-001937, Issue 1 – February 1991
ITU Q.921 – 1992 (link layer)
ITU Q.931 – 1993 (network layer)
TR-TSY-00860, ISDN Calling Number Identification
Services – February 1989, and Supplement –
June 1990
Power Consumption 60 mA at 15 VDC
Average power .9 watt (3.07 Btu per hour)
Weight 0.27 lbs. 4.3 oz. (0.12 kg 122 grams)
Switch Compatibility National ISDN-1 (NI-1)
Service Supported Capability Package IOC B for 1B-service, which
supports up to two circuit-switched B-channels, BRI-B1
and BRI-B2, with one Service Profile Identification
(SPID) number and one local phone number.
Capability Package IOC R for 2B-service, which
supports up to two circuit-switched B-channels, BRI-B1
and BRI-B2, with two SPID numbers and two local
phone numbers.
Switched Network Interface One USOC RJ49C 8-pin keyed modular plug and jack,
specified in ISO/IEC 8877
Transmit Interface
Signal Level
Impedance
13.5 dBm nominal over frequency band, 0 Hz – 80 kHz
135Ω
Receive Interface
Dynamic Range
Impedance
Operates on 2-wire loops, defined in ANSI T1.601-1992
135Ω
Modulation and Frequency 2B1Q line coding with 4-level amplitude modulation
(PAM) at 80 Kbps baud
Channel Equalization
Receiver Automatic adaptive equalizer with echo cancellation