Paradyne COMSPHERE 3610, Руководство по замене

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COMSPHERE 3600 Data Service Units
1-10 December 1996 3610-A2-GB43-50
Table 1-8
ISDN DBM and DBM-I Technical Specifications
Specifications Criteria
APPROVALS
DOC
Certification 230 6943 A
APPLICATION Full-duplex data transmission via ISDN BRI U-Interface for point-to-point or
multipoint facilities
MODULATION AND FREQUENCY 2B1Q line coding with 4-level pulse amplitude modulation (PAM) at
80 K baud
CHANNEL EQUALIZATION
Receiver
Automatic adaptive equalizer with echo cancellation
COMMUNICATION LINE 2-wire BRI ISDN line
DATA RATES 56 and 64 kbps
(Note that ISDN DBM or DBM-I use proprietary rate
adaption to support data rates of less than 64 kbps.)
DBM COMPATIBILITY Compatible with 3600 Series 2-wire and 4-wire Switched 56 DBMs
RECEIVE INTERFACE
Dynamic Range
Impedance
Operates on 2-wire loops as defined in ANSI T1.601-1992
135
Ω
SWITCHED NETWORK INTERFACE
3610 DSU
3611 DSU
8-pin non-keyed modular jack
USOC SJA11 U-Interface Connector
(One or two) 50-pin connector
Permissive: USOC RJ21X
TRANSMIT INTERFACE
Signal Level
Impedance
13.5 dBm nominal over frequency band from 0 Hz to 80 kHz
135
Ω