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Yealink SIP-T21 E2 - Log Issues

Yealink SIP-T21 E2
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Troubleshooting
159
3. Enter the desired time in the Play Hold Tone Delay field.
4. Click Confirm to accept the change.
How to make a call using SRTP?
You can enable SRTP to encrypt the audio stream(s) of phone calls. The parties
participating in the call should enable SRTP on a per-line basis.
To enable SRTP on a per-line basis via web user interface:
1. Click on Account->Advanced.
2. Select the desired account from the pull-down list of Account.

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