How does an MTSO account for billing?Question 2Answera.assign voice channelb.perform handoffsc.connect callsd.monitoring calls

The question seems to be incomplete. However, I can provide information based on what you've given.

A Mobile Telephone Switching Office (MTSO) is responsible for connecting calls, monitoring calls, performing handoffs, and assigning voice channels in a cellular network.

1. Assign Voice Channel: When a call is made or received, the MTSO assigns a specific frequency channel to the call so that the conversation can occur without interference.

2. Perform Handoffs: When a mobile device moves from one cell (coverage area) to another during a call, the MTSO performs a handoff. This means it transfers the call's control from the previous cell tower to the new one, without interrupting the call.

3. Connect Calls: The MTSO connects the calls between the mobile device and the other party. This could be another mobile device, a landline, or a device on a different network.

4. Monitoring Calls: The MTSO also monitors ongoing calls to manage the network's resources efficiently. This includes ensuring that the call quality is maintained and that the network is not overloaded.

As for billing, the MTSO keeps track of all calls made and received, including their duration and other details. This data is used to generate the user's bill. However, the specific process can vary depending on the service provider's billing system and policies.