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Technical Specifications
Specification
ISDN BRI DBM
ISDN BRI DBM Interface
(FrameSaver 9126)
Physical interface
Service supported
Data rates
Standards Compliance
Power Consumption
Weight
Switch Compatibility
Switched Network Interface
Transmit Interface
Signal Level
Impedance
Receive Interface
Dynamic Range
Impedance
Modulation and Frequency
Channel Equalization
Receiver
Criteria
ISDN BRI U-interface:
One 8-position modular keyed USOC RJ49C jack
RJ49C
Capability Package B for 1B-channel service, or
Capability Package I for 2B-channel support,
NI-1 (supporting up to two B-channels)
56 kbps and 64 kbps
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
60 mA at 15 Vdc
Average power .9 watt
0.27 lbs. 4.3 oz. ( 0.12 kg 122 grams)
National ISDN-1 (NI-1)
One USOC RJ45 8-pole keyed modular plug and
jack, specified in ISO/ IEC 8877
13.5 dBm nominal over frequency band,
0 Hz – 80 kHz
135 Ω
Operates on 2-wire loops,
defined in ANSI T1.601-1992
135 Ω
2B1Q line coding with
4-level amplitude modulation (PAM) at 80 kbps
Automatic adaptive equalizer with echo cancellation
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