Lab-safe

Configuration walkthroughs

Each walkthrough is an order of checks. It is not a screen-by-screen copy of an admin guide, and it does not log in anywhere.

1. Class of service

1. Name the calling search space on the line, then the one on the device. The line CSS is searched first.
2. List partitions. Put the emergency partition before any partition that contains 9.@.
3. Dial 911 in the CSS lab on the labs page. Confirm the emergency pattern wins.
4. Only then add a national pattern.

2. CUBE dial-peers

1. Decide the inbound match. If nothing matches, the leg is dial-peer 0.
2. Decide the outbound match: longest destination-pattern, then lowest preference.
3. Write down whether each leg is early offer or delayed offer.
4. Place one test call and read both SDPs before you add a second carrier.

3. Webex Calling PSTN

1. Name the model: Calling Plan, or a local gateway for that location.
2. If it is Calling Plan, stop looking for a CUBE on the path.
3. If it is a local gateway, confirm the location points at the gateway you are tracing.

4. Teams Direct Routing

1. Confirm the user is Direct Routing, not Calling Plan or Operator Connect.
2. Get OPTIONS answered before you debug an INVITE.
3. Then place one call and keep the SBC's carrier leg in the same capture.

Sources

• CUCM 15 system configuration
• Webex Calling help
• Direct Routing plan