A and D

Foreign Exchange Station (FXS) ports connect to analog station endpoints (such as fax machines, modems, and telephones). Foreign Exchange Office (FXO) ports connect to the PSTN or act as PBX trunk connections. The third type of analog interface (E&M) is not listed in the question.

B and D

Cisco Catalyst switches have the ability to provide PoE (both 802.3af and the Cisco prestandard) and handle CoS tagging on incoming packets (both on the data and voice VLANs).

B and C

All Cisco IP Phones use Skinny signaling to communicate with the Cisco CallManager, but only the router-like device that uses Skinny is the VG200 series. This is because the VG200 series acts as a number of end devices with numerous FXS ports.

D

The correct wildcard to use on voice gateway devices is the "." which matches any dialed digit. When configuring route patterns on the Cisco CallManager, you use the "X" wildcard to accomplish this same thing.

C

The Call Classification feature gives you the ability to distinguish and monitor OnNet and OffNet calls through the gateway. Using this information, you can prevent toll-fraud techniques using conference calls and transfers.

B

When configuring an MGCP router, you can use the syntax mgcp call-agent ip_address to designate the primary Cisco CallManager. You can use the ccm-manager redundant-host syntax to designate the secondary and tertiary Cisco CallManager servers. The tertiary CallManager in this syntax is 10.1.1.6.

A and B

You can configure a switch running the NativeIOS using the same configuration as you would a standard voice gateway. Non-IOS MGCP is used if the 6500 Catalyst switch is running the CatOS operating system.

B

Trunk configurations are logical links to other networks. They have the ability to determine the location of an endpoint, but do not carry voice traffic. Gateways also act as logical links to other networks, but the CallManager also uses them to route voice traffic.

B

Gatekeepers ease configuration of Intercluster Trunk connections by providing a central point of trunking. Without a gatekeeper, every CallManager cluster must have an Intercluster Trunk connection to every other cluster in a full-mesh relationship. Unfortunately, gatekeepers also introduce a single point of failure in the network, which is why you should consider additional failover mechanisms for this device.

C

CallManager uses the H.225 Registration, Admission, and Status (RAS) protocol to communicate with the gatekeeper. You can think of this as a conversation protocol that allows the CallManager to determine the location of an endpoint and the authority to send the call.