RMX 2000 Administrator's Guide - Polycom Support

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Chapter 2-Additional Conferencing Information LPR – Lost Packet Recovery Packet Loss Lost Packet Recovery 2-38 Lost Packet Recovery (LPR) and Dynamic Bandwidth Allocation (DBA) help minimize media quality degradation that can result from packet loss in the network. Packet Loss refers to the failure of data packets, transmitted over an IP network, to arrive at their destination. Packet Loss is described as a percentage of the total packets transmitted. Causes of Packet Loss Network congestion within a LAN or WAN, faulty or incorrectly configured network equipment or faulty cabling are among the many causes of Packet Loss. Effects of Packet Loss on Conferences Packet Loss affects the quality of: • Video – frozen images, decreased frame rate, flickering, tiling, distortion, smearing, loss of lip sync • Audio – drop-outs, chirping, audio distortion • Content – frozen images, blurring, distortion, slow screen refresh rate The Lost Packet Recovery (LPR) algorithm uses Forward Error Correction (FEC) to create additional packets that contain recovery information. These additional packets are used to reconstruct packets that are lost, for whatever reason, during transmission. Dynamic Bandwidth Allocation (DBA) is used to allocate the bandwidth needed to transmit the additional packets.
Lost Packet Recovery Guidelines Polycom RMX 2000/4000 Administrator’s Guide • LPR is supported in H.323 networking environments only. • In LPR-enabled Continuous Presence conferences: — Both LPR-enabled and non LPR-enabled endpoints are supported. — The LPR process is not applied to packet transmissions from non LPR-enabled H.323, SIP and H.320 endpoints. • In LPR-enabled Video Switched conferences: — SIP and H.320 endpoints are not supported. — Cascaded links to MGC are not supported. — Non H.323 participants cannot be created, added or moved to LPR-enabled Video Switched conferences. • When connecting via an Entry Queue: — A participant using an LPR-enabled endpoint cannot be moved to a non LPR-enabled conference. — SIP and H.320 participants cannot be moved to LPR-enabled Video Switched conferences. • If packet loss is detected in the packet transmissions of either the video or Content streams: — LPR is applied to both the video and Content streams. — DBA allocates bandwidth from the video stream for the insertion of additional packets containing recovery information. Enabling Lost Packet Recovery LPR is enabled or disabled in the Conference Profile dialog box. • CP Conferences – LPR is enabled by default in the New Profile – Advanced dialog box. • HD VSW Conferences – If High Definition Video Switching is selected, the LPR check box is automatically cleared and LPR is disabled. LPR can be enabled for HD VSW conferences but H.320 and SIP participants will not be able to connect. For more information, see "Defining Profiles” on page 1-8. 2-39
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Polycom RMX 2000/4000 Administrator
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United States Federal Communication
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Table of Contents Polycom RMX 2000/
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Conference Profiles 1 Profiles stor
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Conferencing Modes Standard Confere
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Supplemental Conferencing Features
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Profile Toolbar Polycom RMX 2000 Ad
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Polycom RMX 2000 Administrator’s
Page 27 and 28: The New Profile - Advanced dialog b
Page 29 and 30: 6 Click the Video Quality tab. The
Page 31 and 32: Content Video Definition Polycom RM
Page 33 and 34: Table 1-7 Profile Properties - Vide
Page 35 and 36: Table 1-8 Auto Layout - Default Lay
Page 37 and 38: 12 Select one of the Skin options.
Page 39 and 40: 17 Define the following parameters:
Page 41 and 42: Additional Conferencing Information
Page 43 and 44: Video Resolutions in CP Polycom RMX
Page 45 and 46: Polycom RMX 2000/4000 Administrator
Page 49 and 50: Enabling HD Video Switching Polycom
Page 53 and 54: Content Protocol Polycom RMX 2000/4
Page 55 and 56: 5 Click the Video Quality tab. Poly
Page 63 and 64: Lecture Mode Enabling Lecture Mode
Page 67 and 68: • Designate a new lecturer. Polyc
Page 69 and 70: Enabling Closed Captions — Encryp
Page 71 and 72: Conference Access Polycom RMX 2000/
Page 75 and 76: Enabling Encryption in the Profile
Page 77: Monitoring the Encryption Status Po
Page 83 and 84: Conference Level Polycom RMX 2000/4
Page 85 and 86: Table 2-11 TPX / RPX - Additional V
Page 87 and 88: Enabling Telepresence Conference Le
Page 93 and 94: Enabling Cascading Polycom RMX 2000
Page 95 and 96: Creating the Dial-out Cascaded Link
Page 99 and 100: Monitoring Cascaded Conferences Pol
Page 103 and 104: Cascade Links Conference B Slave Co
Page 113 and 114: MGC to RMX 2000 Cascading Polycom R
Page 117 and 118: Method B (Using a gatekeeper): Poly
Page 125 and 126: Viewing Participant Properties Poly
Page 127 and 128: Meeting Rooms 3 A Meeting Room is a
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Meeting Rooms List Polycom RMX 2000
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Meeting Room Toolbar & Right-click
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Entry Queues, Ad Hoc Conferences an
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Table 4-1 Default Entry Queue Prope
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Modifying the EQ Properties Transit
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Ad Hoc Conferencing Polycom RMX 200
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SIP Factories Creating SIP Factorie
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Table 4-3: New Factory Properties (
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Address Book 5 The Address Book is
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Click the tab to re-open the Addres
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2 Define the following fields: Tabl
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Alias Name/Type (H.323 Only) Polyco
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Deleting Participants from the Addr
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Reservations Guidelines 6 The Reser
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Reservations Polycom RMX 2000/4000
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Reservations Views Toolbar Buttons
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List View List View does not have a
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A confirmation dialog box is displa
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Operator Assistance & Participant M
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The Operator Assistance dialog box
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8 Click the Video Settings tab. The
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Participant Alerts List Polycom RMX
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Moving Participants Polycom RMX 200
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Conference Templates 8 Conference T
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Using Conference Templates Polycom
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The Media Sources tab opens. Polyco
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Conference and Participant Monitori
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Conference Level Monitoring Viewing
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High Definition Video Switching Pol
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Viewing Permissions Tab Chairperson
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Participant Alerts List Polycom RMX
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Channels Used (cont.) Polycom RMX 2
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Viewing Permissions Tab Channel Sta
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Monitoring ISDN/PSTN Participants P
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Recording Conferences 10 The RMX en
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Table 10-4 Recording Participant Ri
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Users, Connections and Notes 11 RMX
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Adding a New User Administrators ca
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Changing a User’s Password Polyco
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Enabling a User Renaming a User Pol
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Connections Polycom RMX 2000/4000 A
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Managing the RMX Users Polycom RMX
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Notes Using Notes Polycom RMX 2000/
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Network Services 12 To enable the R
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Default IP Service (Conferencing Se
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Modifying the Default IP Network Se
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5 Click the Gatekeeper tab. 6 Modif
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Aliases: Polycom RMX 2000/4000 Admi
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10 View or modify the following fie
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11 Click the SIP Servers tab. 12 Mo
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Ethernet Settings (RMX 4000 Only) P
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IP Network Monitoring Polycom RMX 2
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3 Click the H.323 tab. The H.323 ta
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RMX 2000 Polycom RMX 2000/4000 Admi
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ISDN/PSTN Network Services Polycom
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The PRI Settings dialog box is disp
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6 Click Next. The Span Definition d
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10 Define the following parameters:
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3 Click the LAN Ports tab Polycom R
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IVR Services 13 Interactive Voice R
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IVR Services Toolbar Polycom RMX 20
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4 Click the Add Language button. Th
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Video Welcome Slide 24 Click the DT
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Entry Queues IVR Service Polycom RM
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3 Click the Convert Now button. Pol
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The Save As dialog box opens. Polyc
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Default IVR Prompts and Messages Po
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Table 13-12 Default IVR Messages (C
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The Call Detail Record (CDR) Utilit
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General conference section Event he
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Gateway Calls Call Flows 15 The RMX
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Connection Indications Polycom RMX
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4 Click OK. The new Gateway Profile
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RMX Administration and Utilities RM
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The installation proceeds. Polycom
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2 Click the DNS tab. 3 Enter the Lo
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5 Install the certificate. Polycom
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Using an Internal Certificate Autho
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The File to Export dialog box is di
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System and Participant Alerts Polyc
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Table 16-1 Active Alarms Pane Colum
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System Configuration Modifying Syst
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LEGACY_EP_ CONTENT_DEFAULT_ LAYOUT
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5 Click OK to close the Update Flag
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IP_ ENVIRONMENT _LINK=NO ISDN_RESOU
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4 Click OK to close the New Flag di
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Auto Layout Configuration Polycom R
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RMX Time Altering the clock Polycom
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Resource Management Resource Capaci
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Displaying the Resource Report Poly
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ISDN/PSTN Polycom RMX 2000 Administ
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Port Usage Gauges Polycom RMX 2000
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System Information Polycom RMX 2000
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Table 16-14 System Information (Con
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Support for MIB-II Sections Polycom
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Traps Polycom RMX 2000 Administrato
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Defining the SNMP Parameters in the
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Multilingual Setting Polycom RMX 20
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Banner Display Polycom RMX 2000 Adm
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Using Software Management Polycom R
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Ping RMX Guidelines Using Ping Poly
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Notification Settings Polycom RMX 2
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Logger Diagnostic Files Polycom RMX
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Auditor File Viewer Polycom RMX 200
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Table 16-3 Auditor Event Columns (C
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Table 16-4 Alerts and Faults (Conti
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Table 16-5 Transactions (Continued)
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17 RMX Hardware Monitoring The stat
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HW Monitor Pane Toolbar Polycom RMX
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Table 17-4 MCU Properties - Event L
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Table 17-8 MCU Properties - General
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Performing Diagnostics To run Diagn
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Cards Monitor Polycom RMX 2000/4000
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Appendix A Disconnection Causes If
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Table A-1 Call Disconnection Causes
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Table A-2 ISDN Disconnection Causes
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Alarms and Faults Alarms Table B-1
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Table B-1 Alarms (Continued) Alarm
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Appendix C CDR Fields - Unformatted
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The Conference Summary Record Polyc
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Event Records Polycom RMX 2000/4000
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Table C-2 CDR Event Types (Continue
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Line Rate (cont.) 33 - 1024 kbps 34
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Table C-8 Event Fields for Event 2
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H.323 Participant Alias Name/SIP Pa
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H.243 Password Not supported. This
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Disconnection Cause Values Polycom
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Table C-37 Disconnection Cause Valu
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Appendix D Ad Hoc Conferencing and
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Appendix E Participant Properties A
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Appendix F Secure Communication Mod
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Creating/Modifying System Flags Pol
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Securing an External Database Polyc
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Appendix G Configuring Direct Conne
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Connecting to the Management Networ
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Appendix H Setting the RMX for Inte
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2 Expand the Enterprise Pools list.
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Defining a SIP Network Service in t
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9 Click the Send Certificate button
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Active Alarms and Troubleshooting A
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Troubleshooting Known Issues Polyco
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RMX 2000 Administrator's Guide - Polycom Support

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