1.1 A20 Feature Manual2.4.5 Tool—Import→ ARS - Leading Digit→ ARS - Except Code→ ARS - Routing Plan2.4.6 Tool—Export2.8.4 [2-3] Timers & Counters—Dial / IRNA / Recall / Tone—Dial—Extension Inter-digit2.8.17 [2-9] System Options—Option 3—Dial Tone—Dial Tone for ARS2.10.1 [4-1-1] Wired Extension—Extension Settings—Option 2—ARS Itemized Code2.10.8 [4-2-1] Portable Station—Extension Settings—Option 2—ARS Itemized Code2.12.3 [6-3] Verification Code—Itemized Billing Code for ARS2.14 [8] ARS2.16.1 [10-1] Main—SMDR—SMDR Options—ARS DialPT Programming Manual[320] ARS Mode[321] ARS Leading Number[322] ARS Routing Plan Table Number[325] ARS Exception Number[330] ARS Routing Plan Time Table[331–346] ARS Routing Plan Table (1–16)[350] ARS Carrier Name[351] ARS Trunk Group for Carrier Access[352] ARS Removed Number of Digits for Carrier Access[353] ARS Carrier Access CodeFeature Manual References2.1 Capacity of System Resources1.1.4 Automatic Callback Busy (Camp-on)DescriptionIf the line is busy when a call is made, a callback ring can inform the caller when the line becomes free.If the called party was another extension, or if the dialed number is handled by Automatic Route Selection(ARS), the number is automatically redialed after the extension user answers the callback ring.Conditions• If the callback ring is not answered within 10 seconds, callback is canceled.• If the extension hears a busy tone before dialing the telephone number, only the CO line or trunk groupis reserved. After answering the callback ring, the extension should dial the telephone number.• An extension can set only one Automatic Callback Busy. The last setting is effective.• Multiple extension users can set this feature for the same CO line at the same time.However, a maximum of four extension users can set this feature to one extension.Callback ringing will be sent to extensions in the order that the feature was set. In other words, theextension that set the feature first will receive a callback ringing first.
