AltiGen comm ACM 5.1 manual Trunk Configuration

Chapter 12: Trunk Configuration

•Overlap - Transmitting dialed DTMF digits to the CO without buffering digits in the system first. Use Overlap dialing for analog and T1-CAS trunks for best results. Calls will be completed faster.

•En-bloc- The system will buffer all dialed digits and send it to the CO at once. Typically is used in ISDN-PRI trunk and SIP trunk.

Note: For IP tie trunks, use the IP Dialing Table in AltiEnterprise Manager to set the dialing scheme (AltiEnterprise Manager is available by selecting VoIP > Enterprise Network Management, or from the Windows Start menu).

•Trunk Call Predial String—To have the system automatically insert the configured digits whenever the selected trunk is used for outgoing calls. This feature is used to prevent having to dial “9” twice for trunk access when the system is used behind another PBX system or this trunk is a Centrex line, which requires dialing “9” to make a call. If you select this option, type the predial digit(s) into the text box.

•Enable Centrex Transfer—When checked, the system is able to transfer an incoming call to another outside number through the same trunk and release the incoming trunk. Before you configure this option for the trunk, please make sure your trunk is a Centrex line or supports the Release Line Transfer (RLT) feature. Depending on the type of trunk, your configuration may be different:

•If this is an analog Centrex line, you only need to check the Enable Centrex Transfer check box. A FLASH signal will be transmitted to the CO if the incoming trunk call needs to be transferred to an outside number.

•If this is a T1-CAS trunk, you may need to add “transfer predial string.” From the CO point of view, it is their feature code to initiate RLT. Please check with your carrier to get the specification.

•If this is a PRI trunk, you need to ask your carrier if they support RLT through DTMF. Some carriers accept *8 to signal RLT. AltiGen PRI trunks currently do not support 2-B channel transfer feature.

How to signal AltiServ that it is a Centrex transfer:

•If a call is connected to an extension, the extension user needs to dial FLASH * plus trunk access code and the outside number.

•If a virtual extension forwarding or speed dialing number is configured to an outside number and the extension user transfers a call to the virtual extension or speed dialing number, the system will add the Centrex FLASH automatically. You don’t need to add the “*” in the forwarding or speed dialing digit stream.

•Attribute—In Service makes the trunk available for use. Out of Service prevents the trunk from being used (for example, while performing maintenance).

•Enable Tie Trunk—This configuration field is meaningful only if you use T1 or PRI to connect two AltiServ systems back-to-back. Do not check this box if you connect an AltiServ to a third-party PBX via T1 or PRI trunk.

When this configuration is checked, the system software will interpret the incoming [ANI] [DNIS] digit sequence as [Caller’s Extension Number] and [Target Extension Number]. An incoming tie trunk call will be routed to the target extension and all the Incall Routing rules will be bypassed. If you do not check this box for system-to- system tie trunk, the system will check the Ext. DID/DNIS Routing/Caller ID Routing table first. If there is no match, the trunk incall routing rule will apply.

Note: The Enable Tie Trunk field under Board Configuration > Protocol needs to be enabled for T1/PRI tie trunks as well. It will tell the system to transmit [Caller’s Extension Number] and [Target’s Extension Number] as [ANI] [DNIS] to the other system. In case this is a T1-CAS, which typically cannot

152AltiWare ACM 5.1 Administration Manual