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@PRT 1
IN−2
IN−2
IN−0
FLASH
EXPECT DIAL TONE
420 MS
T ON
600 MS
DIAL TONE
DIAL−2
DIAL−2
DIAL−0
2620 MS
T ON
1000 MS
T OFF
2880 MS
T ON
980 MS
T OFF
2920 MS
T ON
790 MS
ANSWER
6. Review the PRT display to determine the tone cadence of the tone being monitored. Refer to the
How to Modify Application Delays section in this chapter to find the application-delay indexes that
refer to the error received.
7. Enter UPDATE to list the current values in the Application Delay Table; at the dot (.) prompt, enter:
L APP
8. Create a tone timing diagram to help determine the tone cadence.
The tone values from the PRT display and the current application-delay values listed in the
Application Delay Table can be included in the diagram to determine how much an individual tone
needs to be modified.
For the preceding PRT example, the application-delay indexes that refer to the error received are
indexes 50 and 54. Figure 6-3 shows what the failure would look like on a tone timing diagram. Note
that the failure occurred when the PBX sent a TONE ON for 790 ms. The Octel 200/300 was set to
expect a TONE ON (ringback) for no less then 800 ms and no greater than 1200 ms. This is referred to
as the "window." In the diagram, the window for the silence period (TONE OFF) between rings is set
to no less than 2800 ms and no greater than 3400 ms. The TONE OFF values are within that window.
PB60019−01
Enter
The caller enters DTMF digits.
The Octel 200/300 monitors tones for dial tone.
Dial tone is detected.
Octel 200/300 dials DTMF digits.
Octel 200/300 ignores the first tone change.
Octel 200/300 monitors call progress tones from
the PBX to determine the status of the called extension.
Failure: Octel 200/300 detects an answer condition because
one of the tones from the PBX does not conform to delays in
the Application Delay Table.
Maintenance Commands
6-49
Octel 200/300
S.4.1
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