2. VoIP Basics
• Implementing a VoIP Network Can be Intimidating
– Issues:
• Technology (SIP)
• Desktop Hardware & Software Issues
• Network Infrastructure issues
• Nothing Will Uncover Network Infrastructure Problems Faster Than VoIP
– Issues:
• Bottles Necks
• Layer 2 & 3 (QoS Protocols)
• Low Speed WAN Links
• VoIP is a Connection Oriented Low Latency Protocol
– Maximum of 150ms latency one direction
– Less than 40ms of jitter
– Packet Loss of less than 0.05% of the LAN
www.ccgtelecom.com
CCG Telecom
6 Canal Street
Westerly, RI 02891
Authorized Reseller
sales@ccgtelecom.com
401-596-3100
3. Cabling Basics
• The Foundation for Every Network Infrastructure is Copper Cabling
– Cat-3
– Cat-5
– Cat-6
• If Cabling Was Installed After 1995 At Least Cat-3
• What Effect Does this Have on VoIP Phone?
• None and Here’s Why…
– G.711 (Uncompressed Voice) VoIP Bandwidth is 64Kbps plus overhead :=88Kbps per channel
– A VoIP Phone Supporting (6) Lines Pushes Roughly 528Kbps of Bandwidth
– Most VoIP Phones Come With Gigabit Interfaces To Support PC Pass-Thru
– Still Not Pshing the Bandwidth Limits
• 802.3AF Defines Power over Ethernet
– Benefit is Infrastructure Supplies Power
– No Local AC Adaptor Required
– No Power Cord to Kick Loose on Phone…
www.ccgtelecom.com
CCG Telecom
6 Canal Street
Westerly, RI 02891
Authorized Reseller
sales@ccgtelecom.com
401-596-3100
4. • Since the Inception of the Data Networking…
– Voice has always been a private network
• VoIP Merged Everything into a Common Protocol for Transport
– Yet We Still Treat Them as Separate Networks….
– Use vLAN’s to Logically Separate Them
– Use the Same Network Infrastructure to Support Them
– Require Power over Ethernet (PoE) in the LAN Switches [$$]
• Now You Can Retire Your Legacy CAT-3 Cable Infrastructure
• This Has Been the Typical VoIP Transition Scenario
• You Can Implement VoIP & Still Leverage Legacy Voice Cable Infrastructure
– CAT-3 Cabling Was Designed to Handle Transfer Rates up to 10Mbps
– A Single Voice Channel Is Only Fraction of the Max Transfer Rate
• Mixing VoIP in a LAN Switch is NOT a Good Use of Resources
– Adding PoE Drives Up Cost, When Not Used it is Wasted
– vLANs Add Complexity and Layer-3 at Some Point
Separate Networks
www.ccgtelecom.com
CCG Telecom
6 Canal Street
Westerly, RI 02891
Authorized Reseller
sales@ccgtelecom.com
401-596-3100
5. • Implementing VoIP Requires Expansion of LAN Switch Ports
• Power over Long Reach Ethernet (PoLRE) Uses Existing CAT-3 Cable Infrastructure
• The Data and Voice Infrastructures Remain Separate Networks Until the
Convergence Point
• The PoLRE Switches support:
– 24/48 VoIP Handsets up 1,200 Ft
– Power over Ethernet (802.3AF)
– Redundant Power Supplies
– AC/DC Power
– SNMP, WEB GUI, CLI
– 10Mbps Full Duplex
– (2) RJ-45 10/100/1000 CAT-5e
– (2) mini-Gbic TX/SX/LX/ZX/LHX
Infrastructure - ROI
www.ccgtelecom.com
CCG Telecom
6 Canal Street
Westerly, RI 02891
Authorized Reseller
sales@ccgtelecom.com
401-596-3100
6. PoLRE System Basics
• (1) Rack Unit
• 10.6 Watts Per Port
• -52 VDC Sharing
– Multiple Units can be connected
together to share VDC power
• RJ-11 to RJ-45 Adapter @ Desktop
www.ccgtelecom.com
CCG Telecom
6 Canal Street
Westerly, RI 02891
Authorized Reseller
sales@ccgtelecom.com
401-596-3100
7. • The Transition to VoIP can be Accomplished Using Legacy Copper
– Minimum Requirement CAT-3 [24-26AWG]
• PoLRE Uplink Ports Are Connected Directly to Core VoIP Network
– Maintain Latency Factor
– Reduces Contention/Congestion in Core Network
– Voice Traffic Not Affected by Network Re-Convergence (Spanning Tree/Routing)
• VoIP Traffic Remains Isolated from Data Network Traffic
– A Dedicated LAN Switch for PoLRE Uplinks and iPBX or Lync/S4B Servers
– Only Intermingling of Traffic is at the Firewall/Router
• Less Day-to-Day User Management
– Since Isolated From Data Network
– User Connectivity Is Easier To Troubleshoot
The PoLRE Topology Result
