Final answer:
The two ways to check your voicemail from an external number are to press 1 for voicemail options or dial your own number and press *, entering your password if prompted.
Step-by-step explanation:
The two ways to call in from an external number to check your voicemail are:
- Press 1 for voicemail options after calling your voicemail system.
- Dial your own phone number and press the star (*) key when voicemail greeting begins to access the voicemail system.
Option B allows you to interact with the voicemail system directly after verifying your identity, which usually involves entering your password. Option A depends on the specific voicemail system but represents a common feature where pressing 1 will take you to voicemail options if already in the system's menu.