ffffffffffffffffffffffffffffffffffffff
Note: Mode 2 and Mode 3 are defined in the AT&T Digital Multiplexed
Interface (DMI) Technical Specification. For a copy of this manual,
Document 555-025-204, call the Customer Information Center at
1-800-432-6600.
DX25 An abbreviation for D-Channel X.25, configures the ADM for establishment of
outgoing data calls using X.25 packet switched data on the D-Channel. DX25
mode uses the PAD data options.
V.120 The remaining Mode values (whose names start with BV for B-channel V.120
protocol) are appropriate selections for circuit switched connections to
equipment supporting this new industry standard rate adaption protocol. Two
different "frame" modes are supported: Un-numbered Information frame (UI-
frame) mode, and (Numbered) Information frame (I-frame) mode. UI-frame
mode is more efficient than I-frame, but is not error corrected, while I-frame
mode is less efficient than UI-frame, but is error corrected. I-frame mode is
packet-oriented and uses the Packet Assembler Disassembler (PAD) data
options.
Two different channel bandwidths are supported: 64 Kbps and 56 Kbps.
Select BV64U for uncorrected (UI-frame) mode connections over 64 Kbps
facilities.
Select BV64I for error corrected (I-frame) mode connections over 64 Kbps
facilities.
Select BV56U for uncorrected (UI-frame) mode connections over 56 Kbps
facilities.
Select BV56I for error corrected (I-frame) mode connections over 56 Kbps
facilities.
Note: For further information about the new industry standard V.120 rate
adaption protocol, you can obtain ANSI Standard T1.612 from the
American National Standards Institute, 1430 Broadway, New York,
N.Y. 10018.
Parity
Option Values: odd, even, mark, space
Applicable Data Protocols: All
The ADM ignores parity received from your terminal in Local Mode. If a terminal connected to
the ADM requires parity to display Local Mode text, match the parity of the ADM with your
terminal.
Note: The Parity setting of the ADM only affects local mode. The ADM never
bbbbb
adjusts Parity
of data transmitted to the network in data mode. The ADM only adjusts the parity of
X.25 data transmitted from the network if it is specifically requested to do so via an
X.29 message from a remote X.25 host.
During a circuit switched data call, your ADM transports all eight bits of an
Data Options and Profiles 4-11
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