Mike's practical resource library for legacy PBX, business phone system & VoIP troubleshooting.
Find practical troubleshooting, maintenance and administration guides for legacy PBX and business VoIP systems. This resource library covers Avaya IP Office, Nortel Norstar and BCM, Allworx, Comdial, Samsung OfficeServ, Panasonic, Mitel, Siemens, Toshiba, TalkSwitch and common IP-phone and gateway equipment.
Use these guides to diagnose phone-system faults, interpret alarm codes and LED indicators, manage authorized voicemail or administrator access, back up configurations, configure calling features, connect analog devices and resolve VoIP issues such as one-way audio, dropped calls, latency and packet loss.
Always confirm the exact system model and software release before making changes. Save a current configuration backup when available, and perform password-reset or access procedures only as an authorized system administrator or service provider.
Browse Guides by System or Topic
PBX Security, Passwords, and Cabling
Start here for security best practices, default credential references, RJ21/Amphenol cabling information and common Asterisk star codes.
- 10 Tips to Prevent Unwanted Access to your PBX
- Ghost Calls explained and how to prevent them
- Default passwords for PBXs
- RJ-21 25 Pair Amphenol Cable Pin Out Chart
- List of Asterisk * Star Codes
Avaya IP Office Troubleshooting and Administration
Guides for connecting to Avaya IP Office, interpreting hardware status LEDs, backing up configuration data, and resolving common phone-system faults.
- Avaya Troubleshooting Guide for IP Office and Aura
- Avaya IP Office & Partner- Hardware LEDs- What they indicate
- How to Reset Avaya IP Office Passwords
- How to Connect to Avaya IP Office
- Avaya IP Office Backup and Restore Instructions
- Avaya IP Office Admin Software
Nortel Norstar and BCM Troubleshooting
Find Norstar and BCM troubleshooting steps, feature and cause-code references, BCM50 connection instructions, alarm-code explanations, and CallPilot mailbox guidance.
- Nortel Norstar Top 10 Troubleshooting Guide
- Norstar Feature Codes for Quick Reference
- Norstar Cause Codes with Descriptions
- Nortel BCM50- How to Connect
- How to Factory Reset a Nortel BCM50
- Norstar BCM50- LED Light Descriptions
- BCM50, 200, 400, 450 Alarm Codes & Descriptions
- Setting Up a Callpilot Call Center-Guides
- Norstar- Creating a New Mailbox
- Norstar- How to Change a Mailbox Password
Comdial & Vertical Phone System Troubleshooting
Find troubleshooting steps for Comdial DXP and DXP Plus systems, solutions for common Comdial Impact telephone problems, and quick-reference guides to Comdial feature codes.
- Comdial DX-80 & DX-120 Troubleshooting Guide
- Comdial DXP & DXP Plus Troubleshooting: 10 Common PBX Problems
- Comdial Impact Phone Troubleshooting: Top 10 Problems
- How to Reset a Comdial DX-80 Supervisor Mailbox
- List of Comdial Feature Codes
- Comdial/Vertical DX120- Changing Phone Password
Samsung OfficeServ Guides
Find troubleshooting guidance for Samsung OfficeServ and iDCS systems, telephone feature codes, and quick-reference instructions for speed dialing and conference calling.
- Samsung OfficeServ and iDCS Troubleshooting Guide
- How to Set Up a Conference Call on Samsung OfficeServ
- Samsung OfficeServ- Telephone Feature Codes
- How to Set Up Speed Dialing on Samsung OfficeServ
Siemens HiPath Troubleshooting
Find troubleshooting guidance for Siemens HiPath and Hicom systems, plus a quick-reference list of HiPath 4000 AMO commands.
Panasonic KX System Troubleshooting
Find troubleshooting steps for Panasonic KX business phone systems and authorized instructions for resetting voicemail mailbox passwords.
Other Legacy PBX Troubleshooting Guides
Allworx Administration Guides
Find Allworx administrator password and system backup-and-restore instructions.
Mitel SX-200 and Hospitality Phone System Troubleshooting
Review common Mitel SX-200 troubleshooting steps for hospitality and business phone-system environments.
Toshiba Strata CIX Troubleshooting
Find troubleshooting guidance for Toshiba Strata CIX systems.
TalkSwitch Troubleshooting and Admistration
Find authorized administrator password recovery guidance for TalkSwitch system.
Paging, IP Phones and Gateways
Paging
Use these guides to install phone-system paging, reset supported IP phones, connect analog devices through FXS gateways or ATAs, and link sites with compatible VoIP gateway equipment.
IP Phones
- How to Factory Reset Polycom and Yealink IP Phones
- Factory Reset Yealink IP-Phone with Screenshots
- How to Factory Reset Grandstream IP Phone
Gateway Devices
- How to Connect Analog Devices to an IP Phone System
- How to Connect a 2nd Site Using a Grandstream Gateway
VoIP Common Issues
Diagnose common VoIP call-quality and connectivity problems, including dropped calls, one-way audio, choppy voice, echo, packet loss, SIP ALG conflicts, router settings, cable modem signal issues, and fax-over-IP.
Dropped Calls
One-Way Audio, Broken or Choppy Voice, Echo, Static or Hum
- Correcting the Most Common VoIP Issues
- How to Check for Latency and Packet Loss
- How to Troubleshoot One-way Audio
Recommended Routers
VoIP Router Settings
ATA Settings to Correct Echo
Cable Modem Troubleshooting
Connecting a Fax Machine
- General Settings for Your Fax Machine
- Using a Gateway to Connect Your Fax
- How to Use a SPA122 as a Fax Interface
- How to Add T.38 Fax Support in Asterisk
- Brother Fax Machine VoIP Settings
- HP Fax Machine VoIP Settings