Does it seem like your Polycom IP phone's mic is not outputting audio loud enough for parties to hear you on the other end of a call? The following procedure will allow you to make a small edit to the phone's configuration to increase the handset's mic volume. (Polycom firmware UC4.0 or higher required.)

Note: Before attempting to edit configuration, test to make sure that the audio problems are not on the receiving device's end. Be sure to carefully follow each step as outlined below.

Gather phone login information

Access GUI and Modify Config

  1. Using your phone's IP address and admin password, log in to the phone's web interface (GUI) from a browser on a computer on the same network as the phone.
  2. Click Utilities > Import & Export Configuration.
  3. Click to expand the Export Configuration section.
  4. Ensure that All Configuration (except Device Settings) is selected from the drop-down.
  5. Click Export.
  6. At prompt, save the file to your computer.
  7. Locate the file Export_all.cfg in your computer.
  8. Right click on the file and open with a text editor (e.g. Notepad) on your computer.
  9. Add the following script on a new line at the very end, just before the /> :
    voice.gain.tx.analog.handset="12"
    (Note: "12" is the loudest value; the lowest is "-36." Values adjustable in increments of 3.)
  10. Save the file (do NOT rename).
  11. Back in the phone web GUI, click Import.
  12. Follow the prompts to select and upload Export_all.cfg.
  13. Wait for the phone to auto-reboot. Changes will now take affect.
Click here to view an example

See the example config file below (SoundPoint IP 550) -- line added at end:

bg.hiRes.color.selection="3,1"

bg.hiRes.gray.selection="3,1"

bg.medRes.gray.selection="3,1"

call.directedCallPickupMethod="legacy"

call.directedCallPickupString="*66"

call.lastCallReturnString="lcr"

call.offeringTimeOut="0"

call.ringBackTimeOut="0"

call.stickyAutoLineSeize="1"

device.auth.localAdminPassword="--------"

device.auth.localAdminPassword.set="1"

device.set="1"

dialplan.applyToTelUriDial="0"

dialplan.digitmap="[2-9]11|1[2-9]xxxxxxxxx|91[2-9]xxxxxxxxx|x.T"

dialplan.digitmap.timeOut="4|4|4|4"

dir.corp.address="ldaps://pccfg.8x8.com:636"

dir.corp.baseDN="dc=8x8,dc=8x8,dc=com"

dir.corp.password="secret"

dir.corp.port="636"

dir.corp.transport="TLS"

dir.corp.user="cn=Manager,dc=8x8,dc=com"

dir.corp.vlv.allow="1"

dir.corp.vlv.sortOrder="sn givenName telephoneNumber"

feature.corporateDirectory.enabled="1"

feature.enhancedFeatureKeys.enabled="1"

feature.lastCallReturn.enabled="1"

feature.urlDialing.enabled="0"

mb.main.home="https://pcmb.8x8.com/vo-pro-php/?user=----------"

msg.bypassInstantMessage="1"

np.normal.ringing.toneVolume.chassis="-48"

ptt.pageMode.enable="1"

qos.ip.callControl.dscp="AF31"

se.pat.ringer.ringer15.name="LoudRing"

se.pat.ringer.ringer16.name="Warble"

se.rt.custom1.name="Silent"

se.rt.custom1.ringer="ringer1"

se.rt.custom10.name="Beeble"

se.rt.custom10.ringer="ringer10"

se.rt.custom11.name="Triplet"

se.rt.custom11.ringer="ringer11"

se.rt.custom12.name="Ringback-style"

se.rt.custom12.ringer="ringer12"

se.rt.custom13.name="Low Trill Precedence"

se.rt.custom13.ringer="ringer13"

se.rt.custom14.name="Ring Splash"

se.rt.custom14.ringer="ringer14"

se.rt.custom15.name="LoudRing"

se.rt.custom15.ringer="ringer15"

se.rt.custom16.name="Warble"

se.rt.custom16.ringer="ringer16"

se.rt.custom2.name="Low Trill"

se.rt.custom2.ringer="ringer2"

se.rt.custom3.name="Low Double Trill"

se.rt.custom3.ringer="ringer3"

se.rt.custom4.name="Medium Trill"

se.rt.custom4.ringer="ringer4"

se.rt.custom5.name="Medium Double Trill"

se.rt.custom5.ringer="ringer5"

se.rt.custom6.name="High Trill"

se.rt.custom6.ringer="ringer6"

se.rt.custom7.name="High Double Trill"

se.rt.custom7.ringer="ringer7"

se.rt.custom8.name="Highest Trill"

se.rt.custom8.ringer="ringer8"

se.rt.custom9.name="Highest Double Trill"

se.rt.custom9.ringer="ringer9"

softkey.feature.buddies="0"

softkey.feature.callers="1"

tcpIpApp.sntp.address="pool.ntp.org"

tcpIpApp.sntp.gmtOffset="-28800"

tcpIpApp.sntp.gmtOffset.overrideDHCP="1"

tone.dtmf.rfc2833Payload="101"

up.screenCapture.enabled="1"

voice.qualityMonitoring.collector.enable.session="1"

voice.qualityMonitoring.rtcpxr.enable="1"

voice.volume.persist.handset="1"

voice.volume.persist.headset="1"

voIpProt.SIP.dialog.usePvalue="1"

voIpProt.SIP.dtmfViaSignaling.rfc2976="1"

voIpProt.SIP.header.warning.codes.accept="329"

voIpProt.SIP.header.warning.enable="1"

voIpProt.SIP.outboundProxy.address="pcsbc.packet8.net"

voIpProt.SIP.outboundProxy.port="5199"

voIpProt.SIP.sendCompactHdrs="1"

voIpProt.SIP.specialEvent.checkSync.alwaysReboot="1"

voIpProt.SIP.strictLineSeize="1"

voIpProt.SIP.use486forReject="1"

bg.hiRes.color.bm.1.em.name="8x8EM.jpg"

bg.hiRes.color.bm.1.name="8x8.jpg"

bg.hiRes.gray.bm.1.em.name="8x8EM.jpg"

bg.hiRes.gray.bm.1.name="8x8.jpg"

bg.medRes.gray.bm.1.name="8x8256x116.jpg"

bg.VVX_1500.color.bm.1.name="8x8vvx.jpg"

dir.corp.attribute.1.label="Last Name"

dir.corp.attribute.2.label="First Name"

dir.corp.attribute.3.label="Phone Number"

dir.corp.attribute.1.name="sn"

dir.corp.attribute.2.name="givenName"

dir.corp.attribute.3.name="telephoneNumber"

dir.corp.attribute.1.searchable="1"

dir.corp.attribute.2.searchable="1"

dir.corp.attribute.3.searchable="1"

dir.corp.attribute.1.sticky="1"

dir.corp.attribute.2.sticky="1"

dir.corp.attribute.2.type="first_name"

dir.corp.attribute.3.type="phone_number"

efk.efklist.1.action.string="$Chold$460"

efk.efklist.2.action.string="$P1N26$$Trefer$"

efk.efklist.3.action.string="$Chold$594"

efk.efklist.4.action.string="*64$P2N12$"

efk.efklist.5.action.string="*0"

efk.efklist.6.action.string="$FLastCallReturn$"

efk.efklist.1.label="Call Park"

efk.efklist.2.label="Blind XFer"

efk.efklist.3.label="xfrVM"

efk.efklist.4.label="InterCom"

efk.efklist.5.label="Record"

efk.efklist.6.label="LCR"

efk.efklist.1.mname="callpark"

efk.efklist.2.mname="blindxfer"

efk.efklist.3.mname="xfer2vm"

efk.efklist.4.mname="intercom"

efk.efklist.5.mname="record"

efk.efklist.6.mname="lcr"

efk.efklist.1.status="1"

efk.efklist.2.status="1"

efk.efklist.3.status="1"

efk.efklist.4.status="1"

efk.efklist.5.status="1"

efk.efklist.6.status="1"

efk.efkprompt.1.label="Blind transfer to:"

efk.efkprompt.2.label="Extension:"

efk.efkprompt.1.status="1"

efk.efkprompt.2.status="1"

efk.efkprompt.1.type="numeric"

efk.efkprompt.2.type="numeric"

msg.mwi.1.callBack="555"

msg.mwi.2.callBack="555"

msg.mwi.3.callBack="555"

msg.mwi.4.callBack="555"

msg.mwi.5.callBack="555"

msg.mwi.6.callBack="555"

msg.mwi.1.callBackMode="contact"

msg.mwi.2.callBackMode="contact"

msg.mwi.3.callBackMode="contact"

msg.mwi.4.callBackMode="contact"

msg.mwi.5.callBackMode="contact"

msg.mwi.6.callBackMode="contact"

ptt.pageMode.group.1.allowTransmit="0"

ptt.pageMode.group.1.available="0"

ptt.pageMode.group.24.label="Priority"

ptt.pageMode.group.25.label="Emergency"

ptt.pageMode.group.1.subscribed="0"

reg.1.address="0455346587"

reg.1.auth.password="macXOfQXls"

reg.1.auth.userId="0455346587"

reg.1.displayName="Ali Balkhi"

reg.1.label="1818 Ali"

reg.1.lineKeys="2"

saf.2="LoudRing.wav"

saf.3="Warble.wav"

se.pat.misc.messageWaiting.inst.1.type="silence"

se.pat.misc.messageWaiting.inst.2.type="silence"

se.pat.misc.messageWaiting.inst.3.type="silence"

softkey.1.action="!callpark"

softkey.2.action="!blindxfer"

softkey.3.action="!intercom"

softkey.4.action="*69"

softkey.5.action="555"

softkey.6.action="!xfer2vm"

softkey.7.action="!record"

softkey.8.action="556"

softkey.1.enable="1"

softkey.2.enable="1"

softkey.3.enable="1"

softkey.4.enable="1"

softkey.5.enable="1"

softkey.6.enable="1"

softkey.7.enable="1"

softkey.8.enable="1"

softkey.1.label="Park"

softkey.2.label="BlindXfer"

softkey.3.label="InterCom"

softkey.4.label="LCR"

softkey.5.label="VoiceMail"

softkey.6.label="xfrVM"

softkey.7.label="CallRecord"

softkey.8.label="ConfServ"

softkey.1.use.active="1"

softkey.2.use.active="1"

softkey.6.use.active="1"

softkey.7.use.active="1"

softkey.3.use.dialtone="1"

softkey.4.use.dialtone="1"

softkey.5.use.dialtone="1"

softkey.8.use.dialtone="1"

softkey.3.use.idle="1"

softkey.4.use.idle="1"

softkey.5.use.idle="1"

softkey.8.use.idle="1"

voice.qualityMonitoring.collector.server.1.address="cq.8x8.com"

voice.qualityMonitoring.collector.server.1.port="5960"

voIpProt.server.1.address="8x8.com"

voIpProt.server.1.expires="300"

voIpProt.server.1.port="5199"

voIpProt.SIP.alertInfo.1.class="ringAnswerMute"

voIpProt.SIP.alertInfo.2.class="custom2"

voIpProt.SIP.alertInfo.3.class="custom3"

voIpProt.SIP.alertInfo.4.class="custom4"

voIpProt.SIP.alertInfo.5.class="custom5"

voIpProt.SIP.alertInfo.6.class="custom6"

voIpProt.SIP.alertInfo.7.class="custom7"

voIpProt.SIP.alertInfo.8.class="custom8"

voIpProt.SIP.alertInfo.9.class="custom9"

voIpProt.SIP.alertInfo.10.class="custom10"

voIpProt.SIP.alertInfo.11.class="custom11"

voIpProt.SIP.alertInfo.12.class="custom12"

voIpProt.SIP.alertInfo.13.class="custom13"

voIpProt.SIP.alertInfo.14.class="custom14"

voIpProt.SIP.alertInfo.15.class="custom15"

voIpProt.SIP.alertInfo.16.class="custom16"

voIpProt.SIP.alertInfo.17.class="custom1"

voIpProt.SIP.alertInfo.18.class="custom3"

voIpProt.SIP.alertInfo.1.value="alert-autoanswer"

voIpProt.SIP.alertInfo.2.value="lowtrill"

voIpProt.SIP.alertInfo.3.value="lowdoubletrill"

voIpProt.SIP.alertInfo.4.value="mediumtrill"

voIpProt.SIP.alertInfo.5.value="mediumdoubletrill"

voIpProt.SIP.alertInfo.6.value="hightrill"

voIpProt.SIP.alertInfo.7.value="highdoubletrill"

voIpProt.SIP.alertInfo.8.value="highesttrill"

voIpProt.SIP.alertInfo.9.value="highestdoubletrill"

voIpProt.SIP.alertInfo.10.value="beeble"

voIpProt.SIP.alertInfo.11.value="triplet"

voIpProt.SIP.alertInfo.12.value="ringbackstyle"

voIpProt.SIP.alertInfo.13.value="lowtrillprecedence"

voIpProt.SIP.alertInfo.14.value="ringsplash"

voIpProt.SIP.alertInfo.15.value="loudring"

voIpProt.SIP.alertInfo.16.value="warble"

voIpProt.SIP.alertInfo.17.value="silent"

voIpProt.SIP.alertInfo.18.value="internal"

voice.gain.rx.analog.headset.sidetone="-24"

voice.gain.tx.analog.handset="12"

/>