• Library Information
    • Documentation Guide
    • Conventions
    • Open-Source Software Usage Statement
    • Safety Notices
  • Product Description
    • Introduction
      • Product Positioning
      • Highlights
    • Application Scenario
      • Single-Node Network
      • Distributed Call Management Network (Peer-to-Peer Mode)
      • Distributed Call Management Network (Convergent Mode)
    • X1911/X1960/X1981 Product Architecture
      • X1911 Shelf
      • X1960 Shelf
      • X1981 Shelf
      • Board
        • SCU
        • MTU
        • ASI
        • OSU
      • Power Supply
      • Fan Tray Assembly
      • Cables
    • Functions and Features
      • Basic Voice Services
      • Supplementary Services
      • Advanced Services
      • Intelligent Routing
      • Voice Conference
      • Voice Mailbox Services
      • Automatic Switchboard Service
      • Console
      • CDR
      • Security
    • Operation, Maintenance, and Management
      • Web Management System
      • Web Self-Service System
    • Technical Specifications
      • Physical Specifications
      • Performance and Capacity
      • Ports and Protocols
      • Standard Compliance
  • Plan and Design
    • Deployment Process
    • Checking the Installation Environment
    • Planning Network Data
    • Holding a Kickoff Meeting
  • Installation
    • Applying for a License
    • Quick Installation Guide
    • Grounding Guide
    • Obtaining Software
  • Configuration
    • Before Configuration
    • Configuration Guide (Web Mode)
      • Configuration Process
      • Preparing for Configuration
        • Checking the Prerequisites for Configuration
        • Preparing Configuration Tools
          • Learning About Configuration Tools
          • Logging In to the Web Management System
        • Loading and Backing Up the License File
      • Configuring the Basic Information
        • Configure IP address
        • Configure System time
      • Configuring Boards
      • Allocating User Numbers
        • Allocating Numbers to SIP Users
        • Allocating Numbers to POTS Users
      • Configuring Trunks
        • Configuring an Office Route
        • Configuring Prefixes
        • Configuring Signaling Data
          • Configuring a SIP Trunk
          • Configuring a PRA Trunk
          • Configuring an SS7 Trunk (Voice Data and Signaling Data Sent Through the Same Channel)
          • Configuring a QSIG trunk
          • Configuring an R2 Trunk
          • Configuring an AT0 Trunk
        • Configuring a Clock Source
      • Configuring Toll Fraud Prevention
        • Toll Fraud Check List
        • Background
        • Preventing Theft of the Administrator Right
        • Preventing Calls from Being Transferred Through a Trunk and the VU
        • Preventing Registration or Login of Unauthorized Users
        • Preventing Unauthorized Call Forwarding
        • Outgoing Call Restriction and Maximum Number of Concurrent Toll Calls
        • Configuring the Maximum Number Length for a Prefix
        • Deploying the CDR Server
        • Toll Fraud Emergency Handling
        • Verification
        • Exception Handling
      • Verifying the CDR Service
        • Background information
        • Configuration on the Unified Gateway
        • Configuration on the CDRServer
        • Configuring the Third-Party Billing System
        • Result Validation
      • Advanced Configuration
        • Setting Number Conversion Mode
          • Configuring the Number Change
          • Configuring the Long Number and Short Number
          • Configuring the Number Mapping
          • Configuring the Number Change Based on the Number Length
          • Configuring the Number Change Based on TGLD 
          • Configuring Calling/Called Prefix Routing Configuration
        • Configuring a Common Administrator
        • Configure the Collect Call Service
        • Configuring the Function of Automatically Adding the Outgoing Prefix to a Displayed Calling Number
        • Configuring Call Restriction Policies
          • Configuring the Trunk-based Call Restriction
          • Configuring the 32-Level Right Call Restriction
          • Configuring the Reanalysis Prefix Call Restriction
          • Configuring the Blacklist and Whitelist Call Restriction
          • Configuring Call Barring Upon a Full CDR Pool
          • Configuring Data of Call Restriction for Overloaded CPU
          • Configuring Outgoing Call Rights for a Calling Number Prefix
        • Configuring Intelligent Routing
          • Configuring Rerouting
          • Configuring Time-Based Routing
          • Configuring Routing Based on Charging Rate
          • Configuring Routing Based on Load Balancing
          • Configuring Routing Based on Load Percentage
          • Configuring Routing Based on the User Right Level
          • Configuring Routing Based on Trunk Link Balance
          • Configuring Rerouting Analysis
          • Configuring Trunk Bearer
          • Configuring a Trunk Group
        • Configuring the IP-Phone Console Service
          • Context
          • Configuring Gateway Data
          • Verification
        • Configuring Two-Stage Dial Tone
        • Configuring Signaling Encryption
        • Configuring Media Stream Encryption
        • Customizing AT0 Interface Parameters
          • Overview
          • Grounding Guide
          • Obtaining AT0 Interface Parameters
          • Customizing Typical Parameters (Using the Web Management System)
          • Troubleshooting
        • Configuring IPT Services
        • SNMP Management
        • Dual host and backup function
    • Feature Guide
      • Before You Start
      • Voice Service
        • Voice Calling
        • Video Calling
        • Local Number Query Service
          • Feature Configuration
          • Feature Usage
        • Calling Line Identification Presentation
          • Feature Configuration
          • Feature Usage
        • Calling Name Identification Presentation
          • Feature Configuration
          • Feature Usage
        • Calling Line Identification Restriction
          • Feature Configuration
          • Feature Usage
        • Calling Line Identification Restriction Override
          • Feature Configuration
        • Connected Name Identification Presentation
          • Feature Configuration
          • Feature Usage
        • Calling Name Identification Restriction
          • Feature Configuration
          • Feature Usage
        • Distinctive Ring Tone
          • Feature Configuration
          • Feature Usage
        • Ringback Tone
          • Feature Configuration
          • Feature Usage
        • Call Hold
          • Feature Configuration
          • Feature Usage
        • Call Park
          • Feature Configuration
          • Feature Usage
        • Multi-line Call
          • Feature Configuration
          • Feature Usage
        • Call Waiting
          • Feature Configuration
          • Feature Usage
        • Call Transfer
          • Feature Configuration
          • Feature Usage
        • Call Divert
          • Feature Configuration
          • Feature Usage
        • Call Forwarding
          • Feature Configuration
          • Feature Usage
        • Hotline
          • Feature Configuration
          • Feature Usage
        • Pickup
          • Feature Configuration
          • Feature Usage
        • Automatic Callback
          • Feature Configuration
          • Feature Usage
        • Abbreviated Dialing
          • Feature Configuration
          • Feature Usage
        • Do Not Disturb
          • Feature Configuration
        • Feature Usage
        • Barge
          • Feature Configuration
          • Feature Usage
        • Forced Release
          • Feature Configuration
          • Feature Usage
        • Privileged User
          • Feature Configuration
          • Feature Usage
        • One Number Link You
          • Feature Configuration
          • Feature Usage
        • Three-way Calling
          • Feature Configuration
          • Feature Usage
        • Alarm Clock
          • Feature Configuration
          • Feature Usage
        • Music on Hold(MoH)
          • Feature Configuration
          • Feature Usage
        • Absence
          • Feature Configuration
          • Feature Usage
        • Multi-Number
          • Feature Configuration
          • Feature Usage
        • Audio Paging
          • Feature Configuration (Unicast)
          • Feature Configuration (External Broadcast)
          • Feature Configuration (Associating Emergency Calls)
          • Feature Usage
          • FAQs
        • Secretary Service
          • Feature Configuration
          • Feature Usage
        • Secretary Station Service
          • Feature Configuration
          • Feature Usage
        • Advanced Secretary Service
          • Feature Configuration
          • Feature Usage
          • FAQs
        • Emergency Call
          • Feature Configuration
          • Feature Usage
        • Call Admission Control
          • Feature Configuration
          • Feature Usage
        • Deactivation of All Services
          • Feature Configuration
          • Feature Usage
        • Voice Service Password Change
          • Feature Configuration
          • Feature Usage
        • Busy Lamp Field (BLF)
          • Feature Configuration
          • Feature Usage
        • Extension Mobility
          • Feature Configuration
          • Feature Usage
        • Service Level
          • Feature Configuration
          • Feature Usage
        • Trunk Preemption by User Rights Level
          • Feature Configuration
          • Feature Usage
        • Call Rights Control
          • Feature Configuration
          • Feature Usage
          • FAQs
        • Blacklist and Whitelist Call Barring
          • Feature Configuration
          • Feature Usage
        • Anonymous Call Rejection
          • Feature Configuration
        • Call-out Restriction Service
          • Feature Configuration
        • Hunt Group
          • Feature Configuration
          • Feature Usage
        • PBX Group Line Selection Service
          • Feature Configuration
        • Simultaneous Ringing
          • Feature Configuration
          • Feature Usage
        • Sequential Ringing
          • Feature Configuration
          • Feature Usage
        • Call Group
          • Feature Configuration
          • Feature Usage
        • Direct Inward Dialing(DID)
          • Feature Configuration
        • Service of Number Replacement on the Same Phone
          • Feature Description
          • Feature Configuration
          • Feature Usage
        • Service of Number Change on the Same Phone
          • Feature Description
          • Feature Configuration
          • Feature Usage
      • Automatic Switchboard
        • Configuring the Default Automatic Switchboard
        • Configuring an Automatic Switchboard with a Custom Announcement
          • Data Plan
          • Recording and loading a single voice file: using an IP phone to record
          • Customizing and Loading All System Announcements
          • Configuring Customized Automatic Switchboard Menus and Time Segment Policies
          • Configuring the Access Code for the Automatic Switchboard
          • Verification
        • Configuring the Cyclical Automatic Switchboard
        • Configuring the Automatic switchboard for dialing the switchboard number and extension number together
        • Configuring Local Node Recording and Voice Playback
          • Context
          • Local Voice Playback Scenario 1
          • Local Voice Playback Scenario 2
          • Local Voice Playback Scenario 3
          • Local Voice Playback Scenario 4
          • Local Recording Scenario 1
          • Local Recording Scenario 2
          • Local Recording Scenario 3
        • Troubleshooting
      • Voice Meeting
        • Scheduled Meeting
          • Feature Configuration (ECS+U1900)
          • Feature Usage
        • Instant Meeting
          • Feature Configuration
          • Feature Usage
      • Built-in Voice Mailbox
        • Voice Mailbox
          • Configuring Basic Data
          • Configuring Call Transfer to Voice Mailbox
          • Configuring Directly Leaving Voice Messages
          • Configuring Call Transfer from Automatic Switchboard to Voice Mailbox
          • Configuring Other Optional Operations
          • Feature Usage
          • Troubleshooting
        • Customized Greetings
          • Feature Configuration
          • Feature Usage
        • Customized Announcement Syntax Package
          • Feature Configuration
          • Feature Usage
      • Telephone Recording
        • Background
        • Call Recording
          • Feature Configuration
          • Feature Usage
      • Console
        • Background information
        • System Configuration
        • Automatic Call Distribution
          • Feature Configuration
          • Feature Usage
    • Configuration Examples in Typical Scenarios
      • Multi-Node Network Scenario (Peer-to-Peer)
        • Background
        • Scenario
        • Data Configuration
        • Verification
      • Multi-Node Network Scenario (Convergent)
        • Background
        • Scenario
        • Configuring the Convergent Node
        • Configuring Local Nodes
        • Verification
      • Configuring the Unified Gateway Two-Node Cluster
        • Background
        • Scenario Description
        • Configuring the Active Node
        • Configuring the Standby Node
        • Configuring Local Nodes
        • Configuring the Truck Gateway
      • Configuring Dual-Center Remote Disaster Recovery
        • Background
        • Scenario Description
        • Data Configuration
        • Verification
      • Traditional PBX Interworking Scenario
        • Background
        • Configuration Scenario
        • Configuring Boards
        • Configure User Numbers
        • Configuring Trunks
        • Configuring the Automatic Switchboard
        • Verification
        • Troubleshooting
  • Operation and Maintenance
    • Administrator Guide
      • Overview
        • Application Scope
        • Requirements on Enterprise Administrators
        • Tools
        • Reference Documents
        • Security Precautions
      • Start From Here
        • Logging In to the Web Management System
        • Login to the Web Self-Service system
      • Routine Operations
        • User Registration and Deregistration
          • User Type
          • Configuring Common Users Directly Connected to the unified gateway
          • Configuring IAD Users 
          • Configuring IP Phone Users
        • Same Number When Users Switch Phones
        • Rights-based Call Restriction Service
        • Configuring Voice Services
          • Configuring Simple Services
          • Configuring Complex services
          • Service of Deactivating All Services
        • Modifying Custom Announcements
        • Unlocking Web Login
      • Routine Maintenance
        • Maintenance Item List
        • Checking Equipment Operating Status
        • Checking Equipment Indicators
          • Checking ASI Board Indicators
          • Checking OSU Board Indicators
          • Checking SCU Board Indicators
          • Checking MTU Board Indicators
        • Checking the Humidity in the Equipment Room
        • Checking Temperature in the Equipment Room
        • Checking Equipment Grounding
        • Checking Spare Parts
          • Checking the Storage Environment
          • Checking the Number of Spare Parts
        • Backing Up the Configuration File
        • Removing Dust from Equipment
          • Cleaning Boards
          • Removing Dust from Fan Box
      • Collecting and Reporting Fault Information
        • Filling in the Fault Information Collection Template
      • FAQs
        • Changing the Login Password
        • What to do if you have forgotten your device login password
        • Viewing the device version information
        • How to Upgrade Software
    • Security Maintenance
      • Security Maintenance Overview
        • Security Maintenance Objectives
        • Layered Security Maintenance
      • Application Layer Security
        • Account List
        • CPU Load Control
        • Login Management
        • Remote Access Control
      • Network Layer Security
        • Security Network
        • Management Plane Isolation
        • Network Security Maintenance
          • Gateway Security Maintenance
          • Firewall Security Maintenance
      • Management Layer Security
        • System Maintenance Security Principles
        • Protocol Selection
        • Account Maintenance
        • Password Maintenance
        • Log Maintenance
        • Data Backup
        • Defect Reporting
        • Patch Management
        • Emergency Response Mechanism
      • Typical Security Fault Cases
        • Long-Period Voice Service Interruption
  • Fault Management
    • Emergency Maintenance
      • Overview
        • Applicable Scope
        • Precautions
        • Preparations
      • Quick Troubleshooting
        • General Guideline
          • Fault Classification
          • Fault Handling Principles and Process
          • Fault Handling Process
        • Handling a Device Crash
        • Handling a Board Crash
        • Handling Global Service Congestion
        • Handling Partial Service Congestion
      • Common Operations
        • Restarting Boards
        • Restarting the System
        • Checking Network Status
        • Replacing Parts
          • Overview
            • Basic Process
            • Safety Precautions
          • Replacing a Board
          • Replacing an SD Card
      • Collecting Fault Information
        • Fault Information Collection Template
    • Troubleshooting Guide
      • Overview
        • Fault Level
        • Fault Categories
        • Precautions
        • Fault Sources
        • Troubleshooting Process
      • Common Methods for Locating Faults
        • Call Analysis
        • Alarm Analysis
        • Network Analysis
        • SIP Responses
      • Login and Registration Faults
        • IP Phone
          • Principle
          • Troubleshooting
        • Analog Phone Directly Connected to the Unified Gateway
          • Principle
          • Troubleshooting
        • Analog Phone Under the IAD
          • Principle
          • Troubleshooting
      • Call Faults
        • Background
        • Methods for Locating Call Faults
        • Only One Party Can Hear the Peer Voice
        • Calling Party and Called Party Cannot Hear Each Other
        • Volume Is Low or High
        • Noise in the Line
        • Voice Is Intermittent
        • Call Connection Abnormally
        • Sending and Collecting Digits Fail
        • Number Is Displayed Abnormally
        • Local Calls Failed While Toll Calls Were Successful
        • Voice Prompt Faults
        • A Caller Hears the Voice Prompt That The number you dialed does not exist When Calling an Intra-Office User
      • Trunk Faults
        • Background
          • E1/T1 Trunk Cable
          • PRA Trunk
          • QSIG Trunk
          • SIP Trunk
          • SS7 Trunk
          • R2 Trunk
          • AT0 Trunk
        • E1/T1 Trunk Exception
        • Call Fails on the PRA Trunk
        • SIP Trunk Fault
          • Call Fails on the SIP Trunk
          • Call Interrupts on the SIP Trunk
          • Fail to Call an IMS User Through the SIP Trunk
          • IMS Users Cannot Be Invited to Join a Conference Through the SIP Trunk
        • Call Fails on the SS7 Trunk
        • Call Fails on the R2 Trunk
        • AT0 Trunk Faults
          • Call Failures
          • When an Outer-Office User Dials the Switchboard Number, the Busy Tone Is Heard or the System Repeatedly Prompts the User to Dial an Extension Number
          • Slow Call Connection
          • CLIP Fault
          • Intra-Office User Cannot Hear the Busy Tone When an Outer-Office User Hangs Up
          • Same Phone Rings When Different Numbers Are Called
          • Exception Occurs When the Moderator Invites a User to Join a Phone Conference
          • ONLY, Simultaneous Ringing, or Sequential Ringing Services Are Unavailable
      • Service faults
        • Call Forwarding Faults
        • Transfer Service Faults
        • ONLY Service Faults
          • ONLY Number cannot be bound
          • The User Hears the Busy Tone When Dials the ONLY Number
          • The Sequential Ringing Service or the Simultaneous Ringing Service Fails through ONLY Service
        • Main Number Service Fault
          • Prompt Message Faults By Main Number Service
          • User Faults By Main Number Service
        • Fax service fault
          • Faults Occurring When Sending or Receiving Faxes
          • Fax Quality Is Low
      • System Device Faults
        • Uploading or Downloading a File Fails
        • Fail to Ping Another Device
        • System Data Damage
        • Startup Failure
      • License Faults
        • Preface
        • How to Purchase Licenses
        • How to Activate Licenses
          • Obtaining the ESN
          • Capacity Expansion Scenario
          • Upgrade Scenario
          • Device Replacement Scenario
          • Network Change Scenario
        • How to Load Licenses
    • Alarm
      • ALM-306000078 ASI board fault
      • ALM-306000080 OSU board fault
      • ALM-306008016 MTU board fault
      • ALM-306000284 CPU temperature is too high
      • ALM-306000285 CPU temperature restore
      • ALM-306010055 License run time will be gone
  • Reference
    • Log Reference
      • Log Overview
      • Obtaining Logs
        • Operate Log
        • Call Log
        • Call Analyzer
      • Analyzing Logs
        • Operate Log
        • Call Log
        • Call Analysis
    • Spare Parts Manual
      • UScale X1911 Unified Gateway Spare Parts Manual
      • UScale X1960 Unified Gateway Spare Parts Manual
      • UScale X1981 Unified Gateway Spare Parts Manual
    • Communication Matrix
    • Channel Tone Reference
    • Pin Assignment Reference
      • Pin Assignments of Subscriber Cables
      • E1/T1 Trunk Cable Pin Assignments
    • Common AT0 Parameter Reference
  • Glossary
    • Numerics
    • A
    • B
    • C
    • D
    • E
    • F
    • G
    • H
    • I
    • L
    • M
    • N
    • O
    • P
    • R
    • S
    • T
    • U
    • V
    • W