Campus VoIP

Why an Organization Would use IPT

Trackable Cost Savings:

• Moves, Adds, and changes (Macs)

• Bandwidth and equipment efficiency

• Lower cost of voice transmission

• New applications and devices

Phase One IP Telephony Migration

• Keep the PBX system and digital phones

• Calls routed over WAN rather than PSTN

  • Major benefit: Free LD

  • Major requirement: QoS

Phase Two IP Telephony Migration

• Voice and Data network have become one

• PBX and Digital phones for sale on E-Bay

• True integration between voice and data

• Typically new structures start here

Campus Issues to Power when Deploying VOIP

• Inline Power

• Dual VLANs

• QoS

Understanding and Configuring Dual VLANs

switchport mode access
switchport access vlan 200
switchport voice vlan 100

Understanding and Configuring QoS

• Two QoS markings:

  • Class of service (CoS): layer 2

  • Type of service (ToS): layer 3

mls qos trust cos
mls qos trust device cisco-phone
auto qos voip trust
no auto qos voip cisco-phone