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other SIP endpoints (such as the SIP Multimedia Web Client or an i2004 controlled by the IP Client Manager (IPCM) for voice over IP calls.
An MCP alias must be set up for each user so that the alias is the same as the Calling Line ID sent from the TDM switch to the MCP over PRI. When a non-CDS MCP user calls a CDS user, the call is sent out the gateway to the CDS user’s TDM phone and the non-CDS user’s public/private charge ID is used to identify them to the TDM switch as the calling party. This charge ID is sent to the Converged PC Client, on the SimRing leg of the call, and is used by the Converged PC Client to contact the calling party’s MCP client. Therefore, the non-CDS user’s charge ID must be included as an alias in the non-CDS user’s provisioning. A non-CDS user’s charge ID cannot be shared amongst users within a domain because the charge ID must be included as an alias and a user's aliases must be unique within a domain.
Calls to a CDS user must terminate to the existing switching system of the CDS user before the call is routed to the MCP. For example, the originator’s existing switching system must route calls using the existing systems, as opposed to sending the call to the MCP. This is required since all calls from the SIP PRI gateway are implied to have been triggered by the SimRing feature on the existing switching system.
Interworking with third-party voicemail servers
There are three major types of third-party voicemail servers. The following sections describe how the MCP can interwork with the following types of third-party voicemail servers:
•SIP-based voicemail servers
•Trunk-based voicemail servers
•Line-based voicemail servers
SIP-based voicemail servers
SIP-based voicemail servers are SIP-enabled and can interwork directly with the MCP network. SIP is used to set up connections between the client and the voicemail server. The RTP Media Portal is used to carry the media packets between the client and the voicemail server.
Figure 3 shows how the MCP interconnects with a SIP-aware third-party voicemail server.
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