4-channel USB telephone recording system for Windows PC. Connects via USB and stores all recordings directly on your PC's hard drive — with caller ID pop-up, department management, SQL database, CRM integration, and LAN access. Expandable to 128 channels on one PC.
Key Features
Records 4 PTCL / analog phone lines simultaneously via USB
Stores recordings directly on PC hard drive — unlimited capacity
Caller ID (CID) pop-up — shows caller details on screen instantly
Three recording trigger modes: Voltage, Key, and Sound Control
Real-time monitoring — listen to any live call without disturbance
Email notifications — alerts for low disk, disconnection, and more
Department management — organize recordings by team or extension
SQL database backend — advanced search, filter, and reporting
FTP remote upload — headquarters can access branch recordings
CRM integration — pop-up customer info on incoming calls
Expandable — chain multiple units up to 128 channels on 1 PC
LAN access — search and play recordings from any networked PC
Loop recording — auto-deletes oldest files when PC disk is full
Compatible with Windows XP through Windows 10 (32 & 64-bit)
Connect PTCL lines to the T5U4's RJ11 ports, connect to your Windows PC via USB, and install the free RecorderMax software. Every call records automatically to your PC's hard drive as a timestamped WAV file. Monitor all 4 channels live, search by date/caller, and receive pop-up caller ID alerts.
What's in the Box
Tansonic T5U4 USB Recording Box
USB Cable (connects to PC)
RJ11 Phone Cables × 4
RecorderMax PC Software (CD / Download)
User Manual (English)
Warranty Card
General Specifications — T5U4
Platform
Tansonic (Tangxin Technology, China)
Model Number
T5U4
Form Factor
USB Recording Box (PC-dependent)
Display
None (uses PC monitor via software)
Power Input
Via USB from PC
Certifications
CE
Warranty
1 Year
Storage & Recording
Onboard Storage
PC Hard Drive (no internal storage)
Recording Format
WAV (PCM)
Storage Capacity
~30 MB/hr/channel on PC HDD — unlimited
Loop Recording
Yes — auto-deletes oldest when PC disk full
Manual Recording
Yes — via software (Key mode)
Recording Trigger
Voltage Control · Key Control · Sound Control
Connectivity
Phone Port
4× RJ11 (Line In) + 4× RJ11 (Handset Out)
Caller ID (CID)
DTMF / FSK — pop-up on PC screen
Compatibility
PTCL · Analog · PABX · Extensions · Trunk lines
PC Software
Windows 2000/XP/Vista/7/8/10 (32 & 64-bit)
Technical Parameters
Recording Specs
Channels
4 Ch
Interface
USB 2.0
Recording Format
WAV (PCM)
Storage
PC Hard Drive
Trigger Modes
Voltage · Key · Sound Control
Caller ID
DTMF / FSK
Max Channels/PC
128 (multi-unit)
Software Features
Department Mgmt
Yes
Email Notification
Yes
CID Pop-up
Yes
SQL Database
Yes
LAN Access
Yes
FTP Remote Upload
Yes
CRM Integration
Yes
Loop Recording
Yes
PC Requirements
OS
Windows 2000 / XP / Vista / 7 / 8 / 10 (32 & 64-bit)
CPU
Pentium IV 2GHz+
RAM
1GB+ recommended
Hard Disk
10GB+ free space
USB Port
USB 2.0 required
Listen to a sample call recorded on the Tansonic T5U4 USB Telephone Call Recorder — 4 Lines, PC Software, CRM. Audio is clean and captures both sides of the conversation.
Sample Call · Tansonic T5U4 USB Telephone Call Recorder — 4 Lines, PC Software, CRM Recording
Both sides captured · Timestamped file
0:000:45
Recording quality note:
Audio format is determined by the device. Both sides of every call are recorded in a single file, retrievable by date and time.
Download software, manuals, and firmware for the Tansonic T5U4 USB Telephone Call Recorder — 4 Lines, PC Software, CRM.
T5U4 User Manual (English)
PDF
↓ PDF
T5U4 Product Brochure
PDF
↓ PDF
T5U4 Application (Windows)
EXE
↓ Download
Does the T5U4 need a PC to record calls? +
Yes. The T5U4 is PC-dependent — it must stay connected to a Windows PC via USB to record. Recordings are saved to the PC's hard drive. There is no internal storage. For standalone recording (no PC required), see TR500 or TR900.
How many phone lines can the T5U4 record? +
4 PTCL lines simultaneously. Expand by connecting additional Tansonic units (T5U2, T5U4, T5U8, T5U16) to the same PC — up to 128 channels total.
How much storage does it need on the PC? +
WAV recordings use ~30MB/hr/channel. With a 1TB PC hard drive, you can store 30,000+ hours. Loop recording auto-deletes the oldest files when disk space is low.
Can it show who is calling before I answer? +
Yes. Caller ID (DTMF/FSK) pop-up shows the caller's number and, if stored, their name, company, and call history from your CRM database.
Can recordings be accessed remotely? +
Yes. LAN access lets any networked PC search and play recordings. FTP upload automatically sends recordings from branch offices to a central server.
What are the PC requirements? +
Windows 2000/XP/Vista/7/8/10 (32 or 64-bit). CPU: Pentium IV 2GHz+. RAM: 1GB+. Hard Disk: 10GB+ free. USB 2.0 port. macOS not supported.
What is the warranty? +
1-year warranty. Contact RecorderMax on WhatsApp (0300 011 1864) for claims or support.
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Tansonic T5U4 USB Telephone Call Recorder — 4 Lines, PC Software, CRM