You are the network engineer at domain.com. Youto connect a Cisco voice gateway to a PBX or the PSTN via ISDN (PRI, QSIG, BRI).
What are two attributes of the PBX/PSTN switch that must be known to understand which features to configure on the voice gateway to connect successfully to it? (Choose two)
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A.
Whether Q.921 or Q.931 is supported by the PBX/PSTN switch.
B.
Whether Symmetric mode is supported by the PBX/PSTN switch.
C.
Which PRI/BRI switch-type is supported by the PBX/PSTN switch.
D.
Whether network or user side is supported by the PBX/PSTN switch.
E.
Whether wink, delay dial, or immediate dial is supported by the PBX/PSTN switch.