All of the devices used in this document started with a cleared (default) configuration. The information in this document was created from the devices in a specific lab environment. The information in this document is based on the Cisco CallManager Server 11.5. Prerequisites RequirementsĬisco recommends that you have knowledge of Cisco Call Manager Web Administration.

Once the status of the SIP (if OPTIONS ping is enabled) is checked, 'No service' error is displayed on the CUCM web GUI for the trunk status under the Device >Trunk page. To avoid port conflicts, ensure that these ports are not configured to listen for any existing SIP Trunk in Cisco Unified Communications Manager.This document describes the situations where calls through SIP trunk might fail because of different causes. The Service does not support any outgoing calls, including calls to 911 emergency service from Hosted VoIP or SIP Trunk seats that are not associated to a stationary IP enabled device (e.g., from Voice Mail Only Seats), unless another telephony device from which the call can be originated via the end user Portal is used. The Calls & Lines Services are available only if the Customer has a valid contract for the use of an analogue Exchange Line (in the case of the wholesale access Service) or digital Exchange Line capable of supporting an existing ISDN30 service (in the case of wholesale ISDN30 Service) direct Exchange Line (for each Exchange Line being ordered) which terminates on a Connection Point or SIP Trunk based exchange on any type of data circuit.įor SIP Trunk: Additionally, CenturyLink does not support Remote BLAs or Remote SCAs on IP Devices used with the Service.

Sending SIP Trunk Diversion Headers on a 911 call may cause the call to route to the incorrect PSAP, or to the correct PSAP but without the correct Customer phone number and location information.Ĭustomer may only use SIP Trunk Diversion Headers when using the Call Forwarding feature with Service. In addition to those warnings, the following additional terms and conditions apply to 911 emergency service provided with SIP Trunk Service and packages or bundles that include SIP Trunk Service.ĬenturyLink will provide labels that will indicate that 911 service has limited availability and functionality when used with SIP Trunk Service and packages or bundles that include SIP Trunk Service, and CenturyLink recommends that the labels be placed on or near the equipment associated with those Services. For SIP Trunk: Additionally, CenturyLink does not support Remote SCAs on IP devices used with SIP Trunk.Ĭustomer shall not send SIP Trunk Diversion Headers on all calls, and in particular shall never send SIP Trunk Diversion Headers on 911 calls.

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