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About Your DSU
1-73550-A2-GB20-10 February 1995
Table 1-3
V.32 DBM Technical Specifications
Specifications Criteria
RINGER EQUIVALENCE NUMBER (REN) DBM option 0.7B
APPLICATION Full- or half-duplex data transmission via analog 2-wire dial network,
point-to-point
MODULATION AND FREQUENCY At 14.4 and 12 kbps: CCITT V.32bis, 1800 Hz
At 4.8 and 9.6 kbps: CCITT V.32, 1800 Hz
At 2.4 kbps: CCITT V.22bis, 2400 Hz
COMMUNICATION LINE 2-wire analog (PSTN) line
DATA RATES 2.4, 4.8, 9.6, 12, 14.4 kbps
DBM COMPATIBILITY If Call Setup is set for Callback or Password security, then the device is
compatible with a Model 3550 or 3551 V.32 DBM.
If Call Setup is set for Alarm or None, then
any
V.32 modem can be
used.
Also, V.22bis at 2.4 kbps can be used.
APPROVALS
DOC
Certification (PSTN)
Load Number
230 3684 A
7
RECEIVE VF INTERFACE
Dynamic Range
V.32 2-wire PSTN
Impedance
–43 to –10 dBm
600 Ω
SWITCHED NETWORK INTERFACE
3550 DSU
3551 DSU
6-pin modular jack
Permissive: USOC RJ11C
8-pin modular jack
Programmable: USOC RJ45S
(One or two) 50-pin connector
Permissive: USOC RJ21X
Programmable: USOC RJ27X
TRANSMIT VF INTERFACE
Signal Level
V.32 2-wire Dial (PSTN)
Impedance
Permissive: –9 dBm
Programmable: –12 to 0 dBm (set by a resistor in the telco jack)
600 Ω