5.3.7 |
Dial Tone Detection |
| Implementing features, see also Manager E Dial Tone Detection |
Definition |
| The system always links analog trunk connections to the Dial Tone Detection routine. The system checks the trunk to determine whether the audible tone is present. The dialing information is not transmitted to the trunk until this check has been performed. |
| The reason for this is that the time until the CO dial tone is received can differ depending on the network operator and network status. |
| Dial Tone Detection is performed: |
| • | After trunk seizure |
| • | After dialing of administrable digits (for example, discriminating digit in the main communications server, LCR) |
| • | When a second dial tone is monitored |
| Dial Tone Detection may not be appropriate, for example, in a Centrex environment, where different tones (to indicate CO Call Forwarding activation, etc.) need to be heard by the user. In such cases, the Trunk Supervision (Dial Tone Detection) flag must be turned off. Then a trunk seizure delay can be programmed before dialing can begin. If trunk supervision is activated, the system waits until a dial tone is detected, even if No pause is selected in this field. |
| The Trunk Seizure delay choices are No Pause, 1, 3, 6 or 9 seconds. |
| If Trunk Supervision is activated, and dial tone is not detected (timer: Dial Tone Monitoring time, default 10 seconds), this line is taken out of operation if there is no dial tone after seizure. Thereafter, the system checks at cyclical intervals whether a dial tone is once again present. When it is, the line in question is put back into operation. Dial tone monitoring time. |
Model-Specific Data |
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Dependencies/Restrictions |
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| HiPath 3000/5000 V8, Feature Description, Issue 10 | up |
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| Disclaimer & Copyright | ID: P31003H3580F100017618 | 2011-02-07 |