H3C Technologies H3C MSR 50 - Manual (Page 734)

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Figure 737 T1 parameters configuration page (2)
ISDN protocol types supported by VT1 are DSS1, ATT, ANSI, ETSI, NTT, QSIG, NI2, and 5ESS. Table
269 describes the ISDN parameters configuration items.
Configuring BSV line
Select Voice Management > Digital Link Management from the navigation tree, and then click the
icon of the BSV line to be configured to access the BSV parameters configuration page.