TB400, Telecom, VoIP Gateway, Yeastar, BRI, 1U Rackmount / Desktop
4-port ISDN BRI VoIP gateway with software-configurable TE/NT modes, connecting up to 8 digital B-channels to IP-PBX systems.
Product Overview
The Yeastar TB400 is an enterprise 4-port ISDN BRI digital VoIP gateway designed to connect up to eight digital voice B-channels to modern IP telephony networks. Offering 4 independent RJ45 BRI ports with software-selectable Terminal Equipment (TE) or Network Termination (NT) operation, the TB400 bridges legacy ISDN PBXs to SIP trunks or modern IP-PBXs to ISDN BRI lines. Enclosed in a durable metal chassis with an internal 100-240V AC power supply, the TB400 provides carrier-grade Euro-ISDN (Q.921/Q.931) signaling, G.168 echo cancellation up to 128ms, and T.38 digital fax relay. Features such as intelligent call routing, caller ID preservation, and automated provisioning make it a reliable choice for digital voice migration.
Why Buy This Product
8 Digital B-Channels
Provides 4 physical BRI ports supporting 8 simultaneous digital voice lines.
Independent TE/NT Configuration
Each of the 4 ports can be configured independently as TE or NT via software.
Hardware DSP Architecture
Dedicated DSP processing ensures optimal voice quality and zero line jitter.
Best for These Applications
Mid-Sized Enterprises with ISDN
Companies operating 4 ISDN BRI lines connecting to modern IP-PBXs.
ISDN PBX SIP Trunk Upgrades
Enabling legacy ISDN PBXs with 4 BRI trunk ports to use affordable SIP trunks.
Key Advantages
- High Line Concurrency:Processes 8 simultaneous digital calls with G.168 echo cancellation up to 128ms.
- Built-in 100-Ohm Terminators:Software-controlled line terminators simplify installation and prevent signal reflections.
- Versatile Form Factor:Operates either as a desktop device or installed into standard 19-inch racks with included brackets.
Frequently Asked Questions
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Weight | 1.3 |
| Shipping Weight | 1.9 |
| Bri Ports | 4 |
| Voip Channels | 8 |
| Concurrent Calls | 8 |
| Voip Protocols | SIP (RFC3261), IAX2, TLS, SRTP, IPv4, IPv6 |
| Audio Codecs | G.711a, G.711u, G.722 (HD Voice), G.726, G.729A, GSM, iLBC |
| Fax Support | T.38 Fax Relay and T.30 Pass-Through |
| Dtmf Modes | In-Band, RFC2833, SIP INFO |
| Echo Cancellation | ITU-T G.168 Line Echo Cancellation (up to 128ms) |
| Ethernet Ports | 1 x 10/100 Mbps RJ45 |
| Network Protocols | IPv4, IPv6, DHCP, Static IP, PPPoE, VLAN 802.1Q |
| Security Protocols | TLS, SRTP, HTTPS Web GUI, Built-in Firewall |
| Call Routing Features | Least Cost Routing, Caller ID Manipulation, Call Transfer, Call Forwarding, TE/NT Mode Switching |
| Power Supply | 100-240V AC 50/60Hz Internal Power Supply |
| Power Consumption | 12W Maximum |
| Mounting Form Factor | 1U Rackmount / Desktop |
| Dimensions | 213 x 160 x 44 mm |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Certifications | CE, FCC, RoHS |
| Stock | 7 |
Based on 0 customer reviews
No reviews yet
Be the first to review this product and share your experience with other customers.
