Panasonic KX-TDA0480 Installation Manual

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Contents

Panasonic KX-TDA0480 Installation Manual Manual pdf 147 page image

AppendicesInstallation Manual 147A5 Optimising PerformanceAlthough the features of the KX-TDA0480 go a long way toward assuring clear voicecommunications and error free fax transmission over digital data networks, some networkconditions can cause performance degradations.Common causes include:• Voice PAD settings not correctly configured.• Many collisions among packets within the Local Area Network (LAN).• Number of hops packets go through is too large.• High traffic conditions are prevalent on the network.• Routing through a firewall.• Wide Area Network (WAN) transmission delays.• Internet Service Provider (ISP) has inadequate service characteristics.The methods used to prevent problems and optimise performance depend on the type andconfiguration of the network equipment in use. Below are some suggestions that may proveuseful.A5.1 Voice VolumeIn some applications, voice volume may be either too low or too high. The gain control featureoperates on both the incoming and outgoing sides and is referred to as the PAD control. TheKX-TDA0480 is able to optimise the gain or loss level of the voice signals.In most cases, it should not be necessary to modify the default PAD In (PAD value of the voicesignals coming in to the unit)/PAD Out (PAD value of the voice signals going out from the unit)settings. Indications that some adjustment is required are:Voice level too low: Increase gain by decreasing PAD level.Voice loud/distorted: Decrease gain by increasing PAD level.Excessive background noise: Decrease gain by increasing PAD level.See section 4.9.1 Configure Gateway Units (KX-TDA0480) for configuring this informationin the KX-TDA0480.A5.2 Transmission DelaysTransmission delays can cause pauses and loss in voice communications and may result indelays and loss of fax transmissions. These conditions typically arise when there are hightraffic loads (congestion) on the LAN and/or WAN. In the case of the LAN, the network designaffects performance. In the case of the WAN the local router, the link to the ISP (i.e., ISDN,