Multitech CommPlete CC2400, Руководство по установке системы и быстрому запуску

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System Installation and Quick Start Guide
56
Enter Selection (-(previous), q (uit), <1>:
Line Coding is the signaling technique of transmitting binary ones and
zeros (bits). You may choose AMI or HDB3. AMI inverts, or changes
the polarity of successive ones (marks) to maintain ones density.
HDB3 is transparent (not confused with data). It relies on transmission
of both positive and negative pulses. It is based on AMI, but extends this
method by inserting violation codes whenever 4 or more 0s occur
consecutively. This and similar (more complex) codes have replaced
AMI in modern distributed networks.
Type the option number of the line coding that your E1 line uses, or
press E
NTER
to accept the default coding.
28. The Signal Options menu appears:
Signal Options
1. R2 Digital
2. R2 MF
Enter Selection (-(previous), q(uit), <1>):
Type the number of the signaling option recommended for your E1 line,
or press E
NTER
to accept the default option.
R2 MF signaling is used outside the United States, mostly in Europe and
the Far East.
29. The DNIS-digits option appears:
DNIS-digits (1-64 or 0 for auto) (-(previous), q(uit), <0>):
The DNIS (Dialed Number Identification Service) digits option describes
the number of DNIS digits to be received from the CO. Type the number
of digits, or press E
NTER
to accept the default value.
30. The Country Selection option appears:
Country Selection
1. ITU
2. India
3. Mexico
4. Hungary
5. China
Enter Selection (-(previous), q(uit), <1>):
Type the option number corresponding to the country in which you are
using the device. You may select India, Mexico, Hungary or China.
Select ITU for all other locations. Type the number of the option, or
press ENTER to accept the default, ITU.
31. The Line Buildout option appears:
Line Buildout
1. 120 Ohm
2. 75 Ohm
Enter Selection (-(previous), q(uit), <1>):