1.3 C56 Feature Manual1.3.15 CO Line Call LimitationDescriptionCO line calls are limited by the following features:Conditions• During an Unattended Conference Call, the Unattended Conference Recall time is applied. (→ 1.3.16Conference)• When using LCO lines that do not support Calling Party Control (CPC) signal detection (→ 1.3.20 CPC(Calling Party Control) Signal Detection), the CO-to-CO Line Call Duration timer should not be disabled,as automatic end of call detection cannot be performed.Programming ReferencesPC Programming Manual2.8.11 [2-7-1] Class of Service—COS Settings—TRS—Extension-CO Line Call Duration Limit2.8.17 [2-9] System Options—Option 2—Extension - CO Call Limitation—For Incoming Call2.9.1 [3-1-1] Trunk Group—TRG Settings—Main→ CO-CO Duration Time→ Extension-CO Duration Time2.13.5 [7-5] Miscellaneous—Dial Digits Limitation After Answering—Dial DigitsPT Programming Manual[472] Extension-to-CO Line Call Duration[473] CO-to-CO Line Call Duration[502] CO Line Call Duration LimitationFeature DescriptionExtension-to-CO Line CallDurationIf a call between an extension user and an outside party is established,the call duration can be restricted by the system timer selected foreach trunk group. Both parties will hear warning tones at five-secondintervals starting 15 seconds before the time limit. When the time limitexpires, the line will be disconnected. COS programming determineswhether this feature is enabled or disabled. Whether this featureapplies to outgoing calls only, or to both outgoing and incoming calls isdetermined through system programming.CO-to-CO Line Call (exceptUnattended Conference Call)DurationIf a call between two outside parties is established, the call durationcan be restricted by the system timer selected for each trunk group.Both parties will hear warning tones at five-second intervals starting 15seconds before the time limit. When the time limit expires, the line willbe disconnected.If both parties involved in the CO-to-CO line call were established byan extension (e.g., an extension makes a CO line call, then transfersthe call to an outside party), the time limit applied to the CO line callthat was made first will be used.Dialing Digit Restriction duringConversationWhile engaged in an incoming CO line call, the dialing of digits can berestricted. If the number of dialed digits exceeds the limitation, the linewill be disconnected.
