We must configure the interface on S7700 as hybrid mode, then switch can connect to IP Phone, follow the voice vlan service to work. We must change the configuration to let the PC directly communicating with switch.
voice-vlan 701 enable
voice-vlan mode manual
undo voice-vlan security enable
voice-vlan legacy enable
port hybrid pvid vlan 101
port hybrid tagged vlan 701
port hybrid untagged vlan 101
stp edged-port enable
With these configuration, we can meet the requirement of customers highlighted, and PC can access to the Internet.
Although there are many kinds of service configuration on the product document, we should change the configuration based on the product document according to the real situation.