Yealink SIP-T48G Administrator's Manual page 440

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
Details of the Configuration Parameter:
account.X.100rel_enable
Description:
Enables or disables the 100 reliable retransmission feature for account X.
0-Disabled
1-Enabled
X ranges from 1 to 16 (for SIP-T48G/T46G/T29G)
X ranges from 1 to 12 (for SIP-T42G)
X ranges from 1 to 6 (for SIP-T41P/T27P)
X ranges from 1 to 3 (for SIP-T40P/T23P/T23G)
X ranges from 1 to 2 (for SIP-T21(P) E2)
X is equal to 1 (for SIP-T19(P) E2/CP860)
Web User Interface:
Account->Advanced->Retransmission
Phone User Interface:
None
To configure 100 reliable retransmission via web user interface:
1. Click on Account->Advanced.
2. Select the desired account from the pull-down list of Account.
3. Select the desired value from the pull-down list of Retransmission.
4. Click Confirm to accept the change.
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Parameter Permitted Values Default
0 or 1 0