Amtelco infinity series, Техническое руководство

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Controlling the B-Channels • 9-4 •
The H.110 Basic Rate ISDN Board
MD01D disable DTMF detector 1
A query command QObsstt is also available to query the state of the
output terminus “bsstt”. This command corresponds to the Query_Output
command in the MVIP-95 specification. The response takes the form
QObssttm(bsstt) where “bsstt” is the output terminus, “m” is the mode,
and if the mode is enable, the second “bsstt” is the input terminus.
9.3 Configuring the Board
Several steps are necessary when configuring the board. The most
important item is to select the clock mode. Only one board in the system
can generate the Master Clock. If available, an E1, T1, or Primary Rate
ISDN board should serve as the master. If no such board exists in the
system, and one or more of the Basic Rate ISDN ports configured as a
terminal equipment interface is connected to the public switched telephone
network, then one of these ports should be the source of the master clock.
(See Sec. 6.2 for clock mode details) The clocks must be configured
before any switching can take place.
Several other steps may be necessary to configure individual ports. A port
can be configured as unused or undefined, a network termination, or as
terminal equipment. The
“ST” command is used to configure the ports. It
consists of a character to specify the a bank of sixteen ports followed by
sixteen characters representing the port type, one for each port. The bank
is specified by either an “L” for the low bank (ports 0-15) or an “H: for the
high bank (ports 16-31.) An “N” defines a port as a “network termination”
or NT, a “T” as “terminal equipment” or TE, and a “U” as undefined or
unused. As an example, if the first four ports are to operate as TEs, the
next four as NTs, and the rest as unused ports, then the “ST” message to
be sent would be:
STLTTTTNNNNUUUUUUUU
If the “D” command set is to be used for call control, it will also be
necessary to set the protocol level of the ports. This is done with an
“SL”