Cisco 350XG series Administration Manual page 254

VLAN Management
Voice VLAN
Cisco 350XG & 550XG Series 10G Stackable Managed Switches
• Voice VLAN QoS
• Voice VLAN Constraints
• Voice VLAN Workflows
The following are typical voice deployment scenarios with appropriate
configurations:
• UC3xx/UC5xx hosted: All Cisco phones and VoIP endpoints support this
deployment model. For this model, the UC3xx/UC5xx, Cisco phones and
VoIP endpoints reside in the same voice VLAN. The voice VLAN of UC3xx/
UC5xx defaults to VLAN 100.
• Third-party IP PBX-hosted: Cisco SBTG CP-79xx, SPA5xx phones and
SPA8800 endpoints support this deployment model. In this model, the
VLAN used by the phones is determined by the network configuration.
There may or may not be separate voice and data VLANs. The phones and
VoIP endpoints register with an on-premise IP PBX.
• IP Centrex/ITSP hosted: Cisco CP-79xx, SPA5xx phones and SPA8800
endpoints support this deployment model. For this model, the VLAN used
by the phones is determined by the network configuration. There may or
may not be separate voice and data VLANs. The phones and VoIP
endpoints register with an off-premise SIP proxy in "the cloud".
From a VLAN perspective, the above models operate in both VLAN-aware and
VLAN-unaware environments. In the VLAN-aware environment, the voice VLAN is
one of the many VLANs configured in an installation. The VLAN-unaware scenario
is equivalent to a VLAN-aware environment with only one VLAN.
The device always operates as a VLAN-aware switch.
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