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  FAQ's for Features/Specifications


What is the minimum connection rate?
Is there a limit to the number of supported devices off of one PhyAdapter?
What are the data security implications of these devices?
Does the Phybridge UniPhyer support Auto MDIX?
Are the Phybridge UniPhyer and PhyAdapter full duplex (sending and receiving data at the same time)?
Is the UniPhyer SNMP compliant?
How is the Power over Ethernet provided to the IP Phone?
What speeds are provided/supported?
What are the specifications of the PhyAdapter RJ45 port?
Can I attach any Ethernet device?
What is the power consumption of PhyAdapter?
What is the operating temperature of the PhyAdapter?
What is the operating temperature of the UniPhyer?
Do these products support all major VoIP manufacturers?
What IP phones are supported?
What is the maximum POE Class IP device/phone that can be supported?
Do these solutions support video phone applications?
Will the PhyAdapter or IP devices work without power?
How does the Phybridge UniPhyer work with VLAN’s?
How is QOS handled?
Does the Phybridge UniPhyer support CDP and/or LLDP?

What is the minimum connection rate?


The UniPhyer is configured to have a default minimum connection rate of upstream 175 kbps and downstream 2.5 Mbps. The PhyAdapter will not connect to the UniPhyer unless these connection rates are met. This ensures that the necessary bandwidth for VoIP toll grade voice quality is available for each port.


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Is there a limit to the number of supported devices off of one PhyAdapter?


Yes. Each PhyAdapter can power one IP device (all Class 2 and some Class 3). Some IP phones do allow additional IP devices plugged into them, like a laptop computer, allowing multiple network devices to function off the single PhyAdapter connection.

(Note: For the daisy chaining configuration you may require additional Earth ground on the UniPhyer, please consult the UniPhyer Hardware Installation Manual).


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What are the data security implications of these devices?


The Phybridge UniPhyer has two types of network connections, one for Management and one for the Uplink traffic, each configurable to a separate domain. The voice traffic is isolated to the GBE Uplink Network ports; in-band management of the UniPhyer is available through this port, or it may be kept isolated. The MGMT port may also be used for monitoring the UniPhyer; this port operates independently of the Uplink ports.


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Does the Phybridge UniPhyer support Auto MDIX?


Yes. Both GBE ports support straight through or cross over cables. The straight through cable is recommended.


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Are the Phybridge UniPhyer and PhyAdapter full duplex (sending and receiving data at the same time)?


Yes, traffic between the UniPhyer and PhyAdapter and network ports support full duplex.

  • PhyAdapter 10/100 Mbps Full Duplex
  • UniPhyer GEB ports 10/100/1000 Mbps Full Duplex
  • UniPhyer MGMT port is 10/100 Mbps Full Duplex

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Is the UniPhyer SNMP compliant?


The Phybridge UniPhyer supports SNMP messaging on some UniPhyer statistics.

The .mib file is available on the Phybridge website, www.phybridge.com  


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How is the Power over Ethernet provided to the IP Phone?


The Phybridge UniPhyer provides power over the PhyAdapter's RJ45 port, the voltage provided is IEEE 802.3af compliant.


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What speeds are provided/supported?


The per port Signaling connection rates between the PhyAdapter and the UniPhyer are

  • up to 1.4 Mbps upstream,
  • up to 26 Mbps downstream.

Length of wiring, wiring quality and wiring environmental conditions for the two wires between the UniPhyer and PhyAdapter can affect both upstream and downstream signaling rate.

The minimum signaling speed is 175 kbps upstream and 2.5 Mbps downstream.

The signaling rate includes transport overhead, the effective data rate is 80 to 85% of the signaling rate.


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What are the specifications of the PhyAdapter RJ45 port?


The RJ45 port is a 10/100 Mbps Full Duplex Ethernet port that provides IEEE 802.3af compliant voltage to an IP Device connected to the RJ45 port.


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Can I attach any Ethernet device?


Yes. The Phybridge PhyAdapter supports Ethernet devices that are IEEE 802.3af compliant. The connection rate is 10/100BaseT. The Phybridge UniPhyer supports 10/100/1000BaseT connections on GBE copper and fiber ports.


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What is the power consumption of PhyAdapter?


The PhyAdapter consumes a maximum of 2.5 W.


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What is the operating temperature of the PhyAdapter?


The PhyAdapter can operate in areas with ambient temperature from 0 to 40 degrees C. The PhyAdapter does operate above ambient temperature and should be located in an area that gets air circulation.


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What is the operating temperature of the UniPhyer?


The UniPhyer can operate in areas with ambient temperature from 0 to 50 degrees C


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Do these products support all major VoIP manufacturers?


Yes. Any IP PBX device is supported as the Phybridge UniPhyer is configured as a layer 2 switch.


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What IP phones are supported?


All Class1 and Class 2 and some Class 3 IEEE 802.3af compliant IP devices are supported.


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What is the maximum POE Class IP device/phone that can be supported?


Based on IEEE 802.3af standard:

  • All Class 1 devices (0.49 to 3.84 W)
  • All Class 2 devices (3.84 to 6.49 W)
  • Some Class 3 devices. Class 3 power consumption range is 6.49 to 12.95W, the Phybridge UniPhyer can provide up to 10.6W of power to any IP device plugged into the PhyAdapter.

Operational testing is required to determine if the Class 3 IP device you have will work in your unique network topology (the longer the two wire length, the less power is available to the IP device.)

First, please verify the manufacturer's IP Device power consumption specification, if it is less than 10.6 W then you may be able to use a standard PhyAdapter (LB-PA111), you will need to test your IP device in the final network topology to ensure the line power draw and IP device power draw does not exceed the 10.6 W.

A quick test is to plug the IP device into the PhyAdapter and put the IP Device into maximum power consumption. For an IP phone this is usually the ringing state (maximize the ring volume), if the phone does not restart or shut down then your IP device and line load is drawing less power than the 10.6 W maximum.

The UniPhyer limits the current drawn on the RJ45 PoE port. If the power draw of the IP phone (device) and line length exceeds the power that can be provided by the UniPhyer for the IP phone, then it may not power up or will reset during operation. To recover unplug the RJ45 cable from the PhyAdapter. If the problem persists re-test the same IP phone at a very short cable length to verify that problem is related to the IP phone drawing more than the maximum rated at the desired line length.


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Do these solutions support video phone applications?


Yes. Video conferencing requires between 300 and 400 kbps. Verify with your video Phone VoIP Device manuals what the recommended minimum data bandwidth is required. Then check your connection rate of the PhyAdapter through the WEB GUI under the ADSL Interface menu (ADSL -> Data & Inventory -> Op Data-Channel (OP)) to ensure the minimum rate is achieved.


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Will the PhyAdapter or IP devices work without power?


The UniPhyer is the only component that requires connection to a power source. The PhyAdapters and IP devices plugged into the PhyAdapters receive their power from the Phybridge UniPhyer. The Phybridge UniPhyer is a complete PoE solution; no local power pucks or adapters are required for the PhyAdapter or the IP device plugged into the PhyAdapter.


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How does the Phybridge UniPhyer work with VLAN’s?


VLANs are not required when deploying the UniPhyer. The UniPhyer and PhyAdapters act essentially like a “physical” VLAN, this is done by isolating the IP voice traffic to the parallel voice network provided by the UniPhyer system.

The UniPhyer has a default configuration of VLAN 1 with all untagged configuration. This will pass all untagged VLAN traffic or remove the tag from VLAN 1 for data to and from the UniPhyer and PhyAdapter.

If you need to configure your IP phones to work with any fixed VLANs (because you may already be using VLANs on your corporate data network), then you will need to configure the UniPhyer to handle this VLAN traffic.

This requires changing the bridging configuration on the GBE ports and each PhyAdapter port to.

  • change default VLAN to desired VLAN (ex. 1 to 3)
  • enable VLAN tagging
  • ensure port isolation is disabled.

Sample UniPhyer database configuration files are available with VLAN configured.


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How is QOS handled?


The default configuration of the UniPhyer is as a bridge. Because of the point to point topology of the PhyAdapter to Phybridge UniPhyer, customized QOS configuration is not normally required. The UniPhyer does support some layer 3 switch and QOS configuration options (such as VLAN or Spanning Tree). Please consult the WEB GUI manual for more details. An understanding of networking protocols and QOS is required to make configuration changes. In most instances network configuration is not required.


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Does the Phybridge UniPhyer support CDP and/or LLDP?


The UniPhyer does not support the CDP or LLDP messaging protocols. The CDP messages are passed through the Phybridge UniPhyer and PhyAdapters. LLDP messages are not responded to and not passed on through the UniPhyer.


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