Port Poe
2010
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 8 port passive POE power injector kit 48v power supply $42.95 Time Remaining: 18d 11h 55m Buy It Now for only: $42.95 |
 CISCO WS C3560 48PS S 48 Port POE Switch $299.99 Time Remaining: 15h 17m |
 8 port passive POE power injector kit 15v to 24v power supply $43.95 Time Remaining: 2d 19h 40m Buy It Now for only: $43.95 |
 8 port passive POE power injector Ubiquiti Unify OpenMeshTranzeo Mikrotik $22.95 Time Remaining: 5d 19h 22m Buy It Now for only: $22.95 |
 Multi port passive POE power injector for 8x Ubiquiti OpenMeshTranzeo Unifi $22.95 Time Remaining: 24d 19h 48m Buy It Now for only: $22.95 |
 8 port passive POE power injector Ubiquiti Unify Tranzeo Mikrotik Wiligear $24.95 Time Remaining: 17d 13h 6m Buy It Now for only: $24.95 |
 8 port passive POE power injector 24v power supply $44.95 Time Remaining: 28d 13h 2m Buy It Now for only: $44.95 |
 8 port passive POE power injector Ubiquiti Unify Tranzeo Mikrotik Wiligear $12.25 Time Remaining: 26d 16h 42m Buy It Now for only: $12.25 |
 3Com Single Port IEEE 8023af Gigabit PoE Power injector 3CNJ1000PSE $29.99 Time Remaining: 16d 14h 24m Buy It Now for only: $29.99 |
 8 port power over ethernet injector for IP Camera Access Points $16.50 Time Remaining: 25d 16h 52m Buy It Now for only: $16.50 |
 8 port passive POE power injector Ubiquiti Unify OpenMesh $16.50 Time Remaining: 28d 5h 42m Buy It Now for only: $16.50 |
 NEW Phihong PSA16U 480 48V 1 PORT PoE 8023af Injector Power Supply $19.98 Time Remaining: 13h Buy It Now for only: $19.98 |
 Cisco Catalyst WS C2960 24PC L 24 Port PoE Power Over Ethernet Network Switch $754.37 Time Remaining: 5d 22h Buy It Now for only: $754.37 |
 8 port passive POE power injector Ubiquiti OpenMesh Tranzeo Mikrotik $16.50 Time Remaining: 25d 17h 33m Buy It Now for only: $16.50 |
 NEW Cisco SF100D 08P 8 port 10 100 PoE Desktop Switch $120.99 Time Remaining: 1d 5h 56m Buy It Now for only: $120.99 |
 WS C3524 PWR XL EN Cisco 3500 Series 24 Port PoE Switch w 1 Month Warranty $170.08 Time Remaining: 21h Buy It Now for only: $170.08 |
 NEW Cisco SF100D 16P 16 port 10 100 PoE SF100D 16P NA $206.99 Time Remaining: 22d 9h 43m Buy It Now for only: $206.99 |
 3Com Single Port IEEE 8023at Gigabit PoE Power injector 3CNJ1000PSE $39.99 Time Remaining: 9d 16h 57m Buy It Now for only: $39.99 |
 Multi port passive POE power injector for 8x Ubiquiti OpenMeshTranzeo Unifi $14.95 Time Remaining: 4d 15h 27m Buy It Now for only: $14.95 |
 New Adtran NetVanta 3448 1200821E1 8 Port Multiservice Access PoE Switch $549.99 Time Remaining: 27d 9h 2m Buy It Now for only: $549.99 |
 Power Dsine PD 3501G AC POE 1 PORT 154W GIG MIDSPAN $47.99 Time Remaining: 19d 18h 3m Buy It Now for only: $47.99 |
 PowerDsine 6024 Port 1U Power Injector 8023af POE $195.00 Time Remaining: 29d 9h 4m Buy It Now for only: $195.00 |
 Snom 300 IP SIP VoIP Phone Asterisk 2 line POE Headset Port $48.62 Time Remaining: 8d 9h 9m Buy It Now for only: $48.62 |
 Cisco Small Business SPA501G 8 Line IP Phone PoE and PC Port SPA 501G $77.95 Time Remaining: 14d 18h 13m Buy It Now for only: $77.95 |
 Adtran Single Port POE Power Injector 1200809E1 $42.06 Time Remaining: 16d 11h 34m Buy It Now for only: $42.06 |
 Cisco Small Business SPA504G 4 Line IP Phone With Display PoE and PC Port $600.00 Time Remaining: 4d 5h 49m Buy It Now for only: $600.00 |
 Symbol Motorola Power Injector 1 port PoE 8023af AP PSBIAS 1P2 AFR PD 6077G300 $19.44 Time Remaining: 3d 8m Buy It Now for only: $19.44 |
 Adtran NetVanta 3448 1200821E1 Black 8 Port Multiservice Access PoE Switch $449.99 Time Remaining: 25d 3h 10m Buy It Now for only: $449.99 |
 NEW Cisco HWIC 4ESW POE 4 port 10 100 PoE HWIC $495.00 Time Remaining: 23d 13h 14m Buy It Now for only: $495.00 |
 Cisco WS C3750 48PS S Cisco 3750 Series 48 Port PoE Switch $500.00 Time Remaining: 9d 3h 52m Buy It Now for only: $500.00 |
 CISCO SPA501G 8 LINE IP PHONE POE PC PORT $100.41 Time Remaining: 4d 9h 19m Buy It Now for only: $100.41 |
 CISCO SPA502G 1LINE IP PHONE WITH DISPLAY POE PC PORT $126.36 Time Remaining: 5d 6h 31m Buy It Now for only: $126.36 |
 CISCO SPA502G 1LINE IP PHONE WITH DISPLAY POE PC PORT $126.36 Time Remaining: 4d 9h 8m Buy It Now for only: $126.36 |
 Nortel 4548GT PWR 48 Port Layer 3 Gigabit Stackable Network Switch with POE $1,499.00 Time Remaining: 6d 8h 46m Buy It Now for only: $1,499.00 |
 Adtran NetVanta 1224R PoE 24 Port Gigabit Wired Router Powered On Untested $80.00 Time Remaining: 5d 5h 32m Buy It Now for only: $100.00 |
 AVAYA 700500725 SPPOE 1A IP PHONE SINGLE PORT POE INJECTOR $34.99 Time Remaining: 6d 7h 45m Buy It Now for only: $34.99 |
 Lot of 10 Snom 300 IP SIP VoIP Phone Asterisk 2 line POE Headset Port $486.29 Time Remaining: 8d 9h 37m Buy It Now for only: $486.29 |
 NEW Zyxel PoE 12 Single Port PoE Injector POE12 $43.95 Time Remaining: 4d 14h 15m Buy It Now for only: $43.95 |
 LG Ericsson 1 pair port PoE mid span power supply 1 $65.99 Time Remaining: 27d 17h 25m Buy It Now for only: $65.99 |
 Nortel 4548GT PWR 48 Ports Ethernet Routing Switch AL4500A14 E6 PoE NEW $1,846.61 Time Remaining: 6d 20h 10m Buy It Now for only: $1,846.61 |
 Power Dsine PD 6506G AC M 8023AF 6PORT POE GIG MANAGED $486.99 Time Remaining: 27d 10h 32m Buy It Now for only: $486.99 |
 CISCO SPA501G 8 LINE IP PHONE POE PC PORT $100.41 Time Remaining: 5d 6h 42m Buy It Now for only: $100.41 |
 HP V1905 24 PoE ETHERNET SWITCH 26 PORT JD992AABA $494.40 Time Remaining: 26d 8h 51m Buy It Now for only: $494.40 |
 Zyxel PoE 12 Single Port PoE Injector $40.54 Time Remaining: 12d 2h 25m Buy It Now for only: $40.54 |
 PowerDsine Midspan PD 6506 AC M PoE 6 port Power Injector 1U Rackmount $49.95 Time Remaining: 9d 8h 34m Buy It Now for only: $49.95 |
 Intellinet POE Web Smart Switch 8 Port Desktop IEEE 8023af Compliant $139.95 Time Remaining: 12d 11h 39m Buy It Now for only: $139.95 |
 Cisco HWIC D 9ESW POE 9 Port POE Switch Module 1 Month Warranty $242.98 Time Remaining: 4d 22h 58m Buy It Now for only: $242.98 |
 SMC NETWORKS SMCPWR INJ4 1 Port PoE Power Injector $62.94 Time Remaining: 22d 15h 49m Buy It Now for only: $62.94 |
 Adtran NetVanta 3448 1200821E1 8 Port Multiservice Access PoE Switch $449.99 Time Remaining: 3d 13h 41m Buy It Now for only: $449.99 |
 CISCO SPA509G 12LINE IP PHONE WITH DISPLAY POE PC PORT $184.92 Time Remaining: 4d 9h 20m Buy It Now for only: $184.92 |
 Axis Poe Midspan 8port 8023af Power Injector 5012004 5012 004 $595.13 Time Remaining: 17d 51m Buy It Now for only: $595.13 |
 CISCO 48 PORTS 10 100 1000 SWITCH 2GIG 2SFP LAYER 3 STACKABLE POE SGE2010P $1,632.21 Time Remaining: 28d 16h 15m Buy It Now for only: $1,632.21 |
 CISCO CATALYST WS X4548 GB RJ45V PoE PORT DENSITY BLADE $3,425.00 Time Remaining: 29d 3h 16m Buy It Now for only: $3,425.00 |
 TP Link 8 Port 10 100Mbps Desktop PoE Switch TL SF1008P $69.99 Time Remaining: 11d 19h 9m Buy It Now for only: $69.99 |
 Planet Technology PoE Managed Switch 24 Port Gigabit $529.00 Time Remaining: 26d 6h 6m Buy It Now for only: $529.00 |
 CISCO WS C3750V2 24PS S w 1 faulty port Fully Tested 24 PoE WS C3750 24PS S $680.33 Time Remaining: 26d 19h 11m Buy It Now for only: $680.33 |
 NEW SINGLE PORT POE POWER SUPPLY CABLINCL POE INJECTO $50.23 Time Remaining: 29d 1h 5m Buy It Now for only: $50.23 |
 FOUNDRY FGS624P POE + FGS 2XGC 10G MODULE 2 PORTfesx424 WARRANTY BROCADE $499.00 Time Remaining: 18d 21h 36m Buy It Now for only: $499.00 |
 Allied Telesis PoE Power Over Ethernet Single Port Injector at6101 $29.99 Time Remaining: 29d 7h 57m Buy It Now for only: $29.99 |
 Linksys Spa962 VoIP IP Phone 6 line w POE 2 port switch $174.09 Time Remaining: 22d 15h 23m Buy It Now for only: $174.09 |
 NEW Cisco SF500 48P 48 Port 10 100 PoE Stackable Manage $1,440.99 Time Remaining: 14d 6h 22m Buy It Now for only: $1,440.99 |
 NEW Sealed Cisco HWIC D 9ESW POE HWIC 9 Port 10 100Mbps PoE 3 Mth Wty $388.76 Time Remaining: 5d 16h 3m Buy It Now for only: $388.76 |
 NEW LevelOne FSW 0503 4 Port PoE w1 Port 10 100 Wall Mo $102.99 Time Remaining: 2d 5h 21m Buy It Now for only: $102.99 |
 NEW Cisco SG500 28P 28 port Gigabit PoE Stackable Manag $950.99 Time Remaining: 20d 1h 21m Buy It Now for only: $950.99 |
 Extreme Summit 300 24 13245 24 port POE switch with 2pcs mini GBIC 10051 $145.00 Time Remaining: 27d 13h 53m Buy It Now for only: $145.00 |
 Lot of 10 Snom 300 IP SIP VoIP Phone Asterisk 2 line POE Headset PC Port $500.00 Time Remaining: 8d 11h 1m Buy It Now for only: $500.00 |
 Zyxel POE12 SINGLE PORT POE INJECTOR FOR Kit $63.85 Time Remaining: 27d 21h 36m Buy It Now for only: $63.85 |
 Planet websmart 8 Port POE Gig switch with 2 sfp ports $200.11 Time Remaining: 7d 7h 34m Buy It Now for only: $350.00 |
 New In Box Cisco WS C3560V2 48PS S Switch 48 Port 10 100 POE V2 NIB $2,450.00 Time Remaining: 5d 7h 2m Buy It Now for only: $2,450.00 |
 PowerDsine PD 9001GO AC Single Port Outdoor Poe Midspan $223.27 Time Remaining: 3d 7h 24m Buy It Now for only: $223.27 |
 NEW Cisco SG500 52P 52 port Gigabit PoE Stackable Manag $1,923.99 Time Remaining: 16d 7m Buy It Now for only: $1,923.99 |
 Cisco Systems Inc SF100D 16P 16PORT 10 100 POE SF100D 16P NA Desktop Switch $221.21 Time Remaining: 28d 19h 51m Buy It Now for only: $221.21 |
 Linksys SRW224G4P 24 port 10 100 + 4 port Gigabit Switch WebView PoE Review $485.94 Time Remaining: 20d 55m Buy It Now for only: $485.94 |
 Cisco 3745 Router NMD 36 ESW PWR 38 FE Ports POE Router $645.00 Time Remaining: 6d 4h 13m Buy It Now for only: $645.00 |
 Transition Networks 2 Port PoE Twisted Pair To Fiber Media Converter $238.99 Time Remaining: 6d 15h 33m Buy It Now for only: $238.99 |
 Planet Technology PoE Switch Managed 24 Port $359.00 Time Remaining: 5d 10h 6m Buy It Now for only: $359.00 |
 FOUNDRY FGS624P POE 24 PORT POE GIG E SWITCH fesx424 TESTED FGS 624P $299.00 Time Remaining: 18d 21h 26m Buy It Now for only: $299.00 |
 NEW IP Phone 4Line w PoE and PC Port RC SPA504G RC $136.99 Time Remaining: 18d 23h 30m Buy It Now for only: $136.99 |
 3Com 3CRUS2475 Unified Gigabit Wireless PoE Switch 24 ports Managed $1,131.55 Time Remaining: 27d 5h 37m Buy It Now for only: $1,131.55 |
 Zyxel Communications POE12HP Poe12 hp 1 Port Injector $47.56 Time Remaining: 5d 1h 56m Buy It Now for only: $47.56 |
 Linksys Spa962 VoIP IP Phone 6 line w POE 2 port switch $179.00 Time Remaining: 22d 15h 21m Buy It Now for only: $179.00 |
 CISCO SPA 504G IP PHONE DISPLAY POE PC PORT SPA504G $138.94 Time Remaining: 21d 5h 1m Buy It Now for only: $138.94 |
 CISCO SPA502G IP PHONE WITH DISPLAY POE PC PORT $124.95 Time Remaining: 25d 2h 59m Buy It Now for only: $124.95 |
 Axis 5014 204 T8123 Hi Poe Mdspn 1port Accs High Poe 1port Midspan 30w 5014204 $90.65 Time Remaining: 15d 9h 58m Buy It Now for only: $90.65 |
 POWERSENSE BL 6500 REDHAWK PoE 8 PORT MODULE for BL6524 $195.00 Time Remaining: 7d 5h 7m Buy It Now for only: $195.00 |
 Power Dsine PD 3506 AC 6PORT COST EFFECTIVE POE HUB $251.99 Time Remaining: 9d 9h 22m Buy It Now for only: $251.99 |
 Cisco SPA504G 4 Line IP Phone with 2 Port Switch PoE and LCD Display $126.99 Time Remaining: 4d 6h 15m Buy It Now for only: $126.99 |
 HP A3000 8G PoE 80211a b g n 8 Ports PoE Wireless LAN Controller $1,600.99 Time Remaining: 7d 16h 32m Buy It Now for only: $1,600.99 |
 LG Ericsson SMCPWRINJ4 1 Port PoE Power Injector SMCPWR INJ4 $51.98 Time Remaining: 9d 10h 28m Buy It Now for only: $51.98 |
 Edgewater Edgemarc EC 800POE 8 Port Power of Ethernet 10 100 1000 $375.00 Time Remaining: 15d 15h 41m Buy It Now for only: $375.00 |
 Axis 5700 401 T8124 High PoE Midspan 1 port power injector 60 Watt $157.99 Time Remaining: 7d 8h 23m Buy It Now for only: $157.99 |
 Power Dsine PD 9524G ACDC M POE 24 PORT 72W GIG MIDSPAN MG $1,909.99 Time Remaining: 9d 1h 20m Buy It Now for only: $1,909.99 |
 New 100 OEM Cisco WS C3560X 24P L 24 10 100 1000 ports with PoE+ $1,900.00 Time Remaining: 29d 22h 12m Buy It Now for only: $1,900.00 |
 Altronix Avad NETWAY1P 1 Port Poe Midspan Injector Modaccs W plug in Xfmr $52.15 Time Remaining: 8d 2m Buy It Now for only: $52.15 |
 100 OEM HP J9478A 24 port 10 100 PoE+ zl module $1,099.99 Time Remaining: 26d 20h 20m Buy It Now for only: $1,099.99 |
 CISCO CATALYST ETHERNET SWITCH 24 PORTS 2 SLOT POE LAN BASE WS C3750X 24P L $2,925.19 Time Remaining: 21d 9h 54m Buy It Now for only: $2,925.19 |
 100 OEM Cisco WS X4248 RJ21V PoE 8023af 10 100 48 port $450.00 Time Remaining: 28d 19h 18m Buy It Now for only: $450.00 |
 Cisco 8 10 100 PoE Ports Unmanaged Desktop Switch 10 100Base TX Desktop $137.13 Time Remaining: 4d 18h 58m Buy It Now for only: $137.13 |
 Powerdsine Pd 9024g acdc m f 24 port Gig Poe 1000w Midspan pd9024g acdc m f $1,315.92 Time Remaining: 25d 14h 51m Buy It Now for only: $1,315.92 |
 Powerdsine Pd 9012g acdc m 12 port Gig Poe 450w Midspan pd9012g acdc m $1,037.21 Time Remaining: 11d 22h 4m Buy It Now for only: $1,037.21 |
Port Poe
To VLAN or not to VLAN, that is the question!
An assumption in this blog is that if your company has a ”network administrator” on staff, you have a network that is large enough to require constant ”care and feeding”. As such dumping a bunch of VoIP phones onto your network without VLAN’s would never happen. After all, the fist job of a network administrator is to make the network broadcast space smaller and smaller. That is why we subnet! Take a typical Class C network with 100 network devices on it and dump another 100 VoIP phones in that subnet and you are asking for trouble if you don’t VLAN. To suggest you don’t need a VLAN or at the very least, a separate subnet is just plain silly.
Did you ever hear the expression ’fences make good neighbors”? Well the same concept applies to networks and VLANs make network applications like voice and data, excellent neighbors! Lets assume those 100 desktop computers are in the 192.168.1.0 /24 subnet and you created a new 192.168.2.0 /24 network for your VoIP phones. In a ShoreTel deployment, you will have personal call managers installed on the computers in one network that need to get to the ShoreTel server and switches in the other network. How are you planning to do this? Use the old “router on a stick” solution (send all my LAN traffic up one switch port to a router and back down again)? Let me help you here, no! You are going to set up VLANs and do inter-VLAN routing at backplane hardware speeds on that new POE Ethernet switch you purchased to support your VoIP deployment.
Data networks have become “mission critical” for even the smallest of companies today. Just unplug someone’s Internet connection and you will quickly find out just how important the “network” has become! Start bogging down the network with Voice, Video and Streaming audio and you will quickly learn the value of VLANs. We invest billions of IT dollars on firewalls, spam ware and website filtering software so why would anyone suggest that a VLAN is just to complex to bother with? By the same (excuse the pun) token, why would someone suggest buying a new POE Ethernet switch that was not VLAN capable?
Data networks need to be described within the context of the protocols and business applications that are running on them. Big or small, we continually find that VLANs are an essential component in the maintenance of proper network hygiene. Imagine even a small VoIP deployment in a company enraged in video animation and you can quickly realize that it is not only how many devices I have on the network, but how my network is being used that will determine the qualify of voice in this deployment. We need to make sure that streaming video over even our LAN, does not negatively impact our VoIP deployment. To do this, we need prioritize voice over data and that means we have to establish QOS. To enable LAN based QOS you have to VLAN, because the class of service markings live in the VLAN tag!
Put your VoIP deployment in a multi-site environment with WAN links and the VLAN discussion now moves into the realm of “must have”. Routers use the TOS byte in the IP header to provide enable QOS. As an aside, ShoreTel had the advantage of enabling Transport layer QOS as the VoIP media stream as always on port 5004. With the move to SIP, this advantage has been minimized as the media stream now moves unpredictably over some 16K ports. We can pass QOS information to our WAN links through a variety of strategies, but VLAN’s are an essential element of that strategy.
At the end of the day, unless you have a network that is so small you are running Vonage as your VoIP solution, you need to VLAN! Make sure that your VoIP deployment includes an assessment of your network and that you graphically understand how the network is utilized before you deploy voice. As your internetwork becomes more essential to your network, VLANs will surface into high relief on your radar screen. Consider that your shiny new ShoreTel now provides for Internet messaging and desktop Video as part of its advanced feature set, the idea of deploying a solution without a VLAN is just plain silly.
Normal 0 MicrosoftInternetExplorer4
An assumption in this blog is that if your company has a ”network administrator” on staff, you have a network that is large enough to require constant ”care and feeding”. As such dumping a bunch of VoIP phones onto your network without VLAN’s would never happen. After all, the fist job of a network administrator is to make the network broadcast space smaller and smaller. That is why we subnet! Take a typical Class C network with 100 network devices on it and dump another 100 VoIP phones in that subnet and you are asking for trouble if you don’t VLAN. To suggest you don’t need a VLAN or at the very least, a separate subnet is just plain silly.
Did you ever hear the expression ’fences make good neighbors”? Well the same concept applies to networks and VLANs make network applications like voice and data, excellent neighbors! Lets assume those 100 desktop computers are in the 192.168.1.0 /24 subnet and you created a new 192.168.2.0 /24 network for your VoIP phones. In a ShoreTel deployment, you will have personal call managers installed on the computers in one network that need to get to the ShoreTel server and switches in the other network. How are you planning to do this? Use the old “router on a stick” solution (send all my LAN traffic up one switch port to a router and back down again)? Let me help you here, no! You are going to set up VLANs and do inter-VLAN routing at backplane hardware speeds on that new POE Ethernet switch you purchased to support your VoIP deployment.
Data networks have become “mission critical” for even the smallest of companies today. Just unplug someone’s Internet connection and you will quickly find out just how important the “network” has become! Start bogging down the network with Voice, Video and Streaming audio and you will quickly learn the value of VLANs. We invest billions of IT dollars on firewalls, spam ware and website filtering software so why would anyone suggest that a VLAN is just to complex to bother with? By the same (excuse the pun) token, why would someone suggest buying a new POE Ethernet switch that was not VLAN capable?
Data networks need to be described within the context of the protocols and business applications that are running on them. Big or small, we continually find that VLANs are an essential component in the maintenance of proper network hygiene. Imagine even a small VoIP deployment in a company enraged in video animation and you can quickly realize that it is not only how many devices I have on the network, but how my network is being used that will determine the qualify of voice in this deployment. We need to make sure that streaming video over even our LAN, does not negatively impact our VoIP deployment. To do this, we need prioritize voice over data and that means we have to establish QOS. To enable LAN based QOS you have to VLAN, because the class of service markings live in the VLAN tag!
Put your VoIP deployment in a multi-site environment with WAN links and the VLAN discussion now moves into the realm of “must have”. Routers use the TOS byte in the IP header to provide enable QOS. As an aside, ShoreTel had the advantage of enabling Transport layer QOS as the VoIP media stream as always on port 5004. With the move to SIP, this advantage has been minimized as the media stream now moves unpredictably over some 16K ports. We can pass QOS information to our WAN links through a variety of strategies, but VLAN’s are an essential element of that strategy.
At the end of the day, unless you have a network that is so small you are running Vonage as your VoIP solution, you need to VLAN! Make sure that your VoIP deployment includes an assessment of your network and that you graphically understand how the network is utilized before you deploy voice. As your internetwork becomes more essential to your network, VLANs will surface into high relief on your radar screen. Consider that your shiny new ShoreTel now provides for Internet messaging and desktop Video as part of its advanced feature set, the idea of deploying a solution without a VLAN is just plain silly.
About the Author
DrVoIP is a full service VoIP installation , support and training telephony company. In addition, we offer many free services to support the VoIP community and implement a Cisco VoIP communications system.
How do you daisy chain a Cisco IP phone to a PC if they are supposed to be on separate Vlans?
According to my Cisco book, voice and data need to be on separate vlans. And further, different Vlans are always different subnets. But where I work, the IP phone is daisy chained to the PC from the the switch port. So, the phone is plugged into the wall going to a PoE switch port, and the PC is plugged into the phone with a short patch cable. So one switch port and two vlans? Or one switch port and QoS managed flow on one Vlan? OK, so the frame bound to the PC has to go through the phone. I can't find any info on how this is done. Thanks for any help.
Good observation. I suggest reading up on voice vlans http://www.cisco.com/en/US/docs/switches/metro/catalyst3750m/software/release/12.2_25_ey/configuration/guide/swvoip.html#wp1048966 Long story short, the switch and IP phone form a trunk, where frames sourced from the PC are given different CoS values (default of 0) than the phone. You can even set the switch to use CDP to determine whether or not there's an IP phone on the other end, and extend the QoS trust boundary to the phone based on that.
Also, while best-practice is to maintain a one-to-one mapping of vlans to IP subnets, it is not technically required.
John Somm Talks about Cisco's SRW2008P 8 port managed POE Switch
