Ericsson LBI-39076B - Manual (Page 30)

LBI-39076B CONFIGURATION
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Similarly, other interconnect timing parameters may
need upward adjustment. In addition to the dial tone detect
duration, the following parameters may require changes:
pulse digit delay base, pulse digit delay increment, DTMF
digit delay, DTMF digit detect duration, and line dropping
duration. The adjustment needed can be calculated as
follows (defaults are included in Table 6).
Operation with System Manager
If the Site Controller computer is connected to a System
Manager, the default configuration contained in its
Personality PROMs is not as critical, since it can be re-
configured with the System Manager. However, it must still
specify the ELI option, and should reflect the installed
telephone interconnect hardware and the desired operational
characteristics well enough to run the interconnect system in
an emergency. (Whenever the Site Controller computer
loses power or is reset, the active configuration of the Site
Controller computer’s database is (and will operate by) the
default configuration until an update of the latest database
can be obtained from the System Manager.)
The following user-configurable database parameters
apply to local telephone interconnect systems in general.
They have been grouped by function, rather than System
Manager menu selection. The System Manager menu
selection and panel references are given, following each
parameter and its description, to help you locate the data
field for the parameter. Not all parameters are used for the
ELI system. Notes specifically for the ELI system are
shown where they apply.
General Limits for Site
•
Interconnect - This 24-channel row of parameters
defines (for the site) if a channel is equipped for
telephone interconnect calls. Default is no (N) for all
channels. Enter Y for yes, or leave N for no. Note that
GTI units are usually placed on the highest available
channel numbers.
Site/Device Definition (menu selection 10)
Channel Configuration (panel 1)
Table 6 - Local Interconnect Timing Parameter Adjustments For Release 7
LOCAL TELEPHONE
INTERCONNECT TIMING
PARAMETER
DEFAULT
VALUE
1
ADJUSTED DEFAULT
VALUE
2
(needed with Release 7 to
maintain the same timing
margin as pre-Release 7)
RECOMMENDED
VALUE
3
(assumes the Current Value
4
provides
the desired level of operation)
Dial Tone Detect Duration 1,000 ms
(1 sec) 1,600 ms
(1.6 sec) Use the 1,000 ms if the dial tone is
present within 1/2 sec; otherwise use
Adjusted Default Value.
Line Dropping Duration 4,000 ms
(4 sec)
6,400 ms
(6.4 sec) Use Adjusted Default Value, or optimize
by trying other values between Current
Value and Adjusted Default Value.
1 Default Value: The Default Value is the value used in the Personality if no specific value is specified.
2 Adjusted Default Value: The Adjusted Default Value equals 1.6 times the Default Value. (Example: for a Default Value of
1000 ms, the Adjusted Default Value equals 1.6 times the Default Value of 1000 ms, or 1600 ms.)
3 Recommended Value: The Recommended Value is the value of the parameter that should be used with release 7 and later
Application Software. The recommendations are conservative and are intended to minimize any customer impact by
providing timing margins equivalent with past releases. You can try existing personalities with the Release 7 upgrade; there
may be sufficient timing margin to accommodate the more accurate Release 7 timings. However, be aware of the timing
sequences and be prepared to update the personality if performance problems are encountered.
4
Current Value: The Current Value is the value of the parameter currently being used satisfactorily with pre-release 7
Application Software.