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Software Installation
49
Configuration modification
 For each parameter, the currently active value will be shown in square brackets.
Each modifiable parameter has a “selector” number associated with it and displayed on the left margin. For example,
the parameter “Span Type” has the selector value 5. From this T1 configuration display, the user can modify any of
the displayed parameters by typing in its associated number at the prompt. The user will then be prompted to input a
new value for the parameter.
If the parameter is one for which there is a specific enumerated set of values, each possible value will be shown
along with a selector number unique to it. The user then selects the value by typing in the selector number and
pressing the <Enter> key. Continuing on with the “Span type” parameter as an example, there will be two possible
values: long-haul or short-haul. The selector number for long-haul is 1 and the selector number for short-haul is 2.
On the other hand, if the parameter is one with a broad range of possible values, such as line length, then the user is
simply asked to enter the new value and finish the selection by pressing the <Enter> key.
When a user modifies a parameter, the change doesn’t take effect until the user enters the command letter “S” to
store the new configuration. When any parameter has a value that has been changed from the currently active value,
the new but not yet active value will be shown in angle brackets < >. After the new configuration has been stored
and made active, this new value will be displayed surrounded by square brackets [ ] and the old and no longer active
value will not have any brackets displayed around it.
The user can cancel a change to a parameter by simply pressing the <Enter> key without making a selection and the
parameter’s value will remain unchanged.
Here is an example which shows how to change the above configuration from long-haul to short haul:
       ( user chooses to change the span-type by entering “5” )
      : 5
    The current value for Span Type is Long
    The possible values are:
    1)  Long
    2)  Short
    Hit return to keep the selection unchanged,
    or select a number to choose the new value
       ( user selects short-haul for the span-type by entering “2” )
      : 2
    The current value for Span Type has been changed to Short
    As a consequence of this change, The Line Build-out and
    Receiver Gain Limit parameters have become disabled.
    The Line Length Parameter has become enabled. You need
    to verify its value.
     -----------------------------------------------------------------------------
                            Modem Bank Configuration
     -----------------------------------------------------------------------------
        Parameter       | Possible values     <>=selected      []=active
     -----------------------------------------------------------------------------
     1) T1 Frame Fmt.    |  D4         | [ESF      ] |             |             |
     2) Line Coding      |  AMI        | [B8ZS     ] |             |             |
     3) Jitter Attn.     | [Transmit ] |  Receive    |  Auto       |  None       |
     4) T1 Sig. Prot.    |  GS         |  LS         | [Immediate] |  Wink       |
     5) Span Type        | [Long     ] | <Short    > |             |             |
     6) Line Length      |  133                                                  |
     -----------------------------------------------------------------------------