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