2.11.8 Trunk Call LimitationDescriptionTrunk calls are limited by the following features:Feature DescriptionExtension-to-Trunk CallDurationIf a call between an extension user and an outside party isestablished, the call duration can be restricted by a system timerselected for each trunk group. Both parties will hear warning tones atfive-second intervals starting 15 seconds before the time limit. Whenthe time limit expires, the line will be disconnected. COSprogramming determines whether this feature is enabled or disabled.Whether this feature applies to outgoing calls only, or to both outgoingand incoming calls is determined through system programming.Trunk-to-Trunk Call (exceptUnattended Conference Call)DurationIf a call between two outside parties is established, the call durationcan be restricted by a system timer selected for each trunk group.Both parties will hear warning tones at five-second intervals starting15 seconds before the time limit. When the time limit expires, the linewill be disconnected.If both parties involved in the trunk-to trunk call were established byan extension (e.g., an extension makes a trunk call, then transfersthe call to an outside party), the time limit applied to the trunk call thatwas made first will be used.Budget Management When the preprogrammed call charge limit has been reached, anextension user will hear 3 warning tones at five-second intervals. It isprogrammable whether the line is disconnected after the third tone.After the call has ended, the extension user cannot make further trunkcalls until the charge limit has been increased or cleared by anextension assigned as a manager (® 2.7.2 Budget Management).Dialling Digit Restrictionduring ConversationWhile engaged in an incoming trunk call, the dialling of digits can berestricted. If the number of dialled digits exceeds the limitation, theline will be disconnected.Conditions• During an Unattended Conference Call, the Unattended Conference Recall time is applied.(® 2.14.2 Conference)• When using LCO trunks that do not support Calling Party Control (CPC) signal detection (® 2.11.9 CallingParty Control (CPC) Signal Detection), the Trunk-to-Trunk Call Duration timer should not be disabled, asautomatic end of call detection cannot be performed.• For SIP Extension users, the line will be disconnected without hearing any warning tones when the trunkcall limitation expires.PC Programming Manual References10.7.1 PBX Configuration—[2-7-1] System—Class of Service—COS Settings—CO & SMDR— Extension-COLine Call Duration Limit10.9 PBX Configuration—[2-9] System—System Options—Option 2— Extension - CO Call Limitation—ForIncoming Call11.1.1 PBX Configuration—[3-1-1] Group—Trunk Group—TRG Settings—Main156 Feature Guide2.11.8 Trunk Call Limitation
