The Yeastar TG400L connects 4 mobile SIMs to your company PBX, turning mobile numbers into outside lines for every desk phone. It fits sales teams, customer service desks and clinics that call and text customers on several numbers.
====
The Yeastar TG400L links four mobile SIMs to your company phone system, so mobile numbers become outside lines that any employee can use from a desk phone. Four 4G LTE ports with VoLTE let a sales or support team call and answer on several numbers without everyone carrying a work handset. It is also the model Yeastar uses in its official guide for connecting TG gateways to a P560 PBX.
What the Yeastar TG400L offers
- 4 × 4G LTE ports, one SIM each, with VoLTE.
- 1 × 10/100 Mbps LAN port.
- Bulk SMS, HTTP API and USSD.
- TLS and SRTP encryption plus OpenVPN.
Spread calls across four SIMs
Group the SIMs and choose the Balance strategy, and outbound calls are shared out instead of one SIM running through its minutes first. You can cap call length and monthly minutes per SIM to stay inside each operator plan. Inbound, every SIM can ring a different place: the sales number reaches the sales ring group, the support number goes to the service queue.
Bulk SMS for customers, from a browser
Send one message to dozens of numbers from the web interface, with personal details for each recipient, and schedule it for a set date and time. Clinics use this for appointment reminders; shops use it to tell customers an order is ready. Replies land in the inbox and can be forwarded to email, and your own systems can send and receive through the HTTP API.
SIM status and swapping
The web interface shows each module's status and port number clearly, so you can see which SIM is registered, power that one port down and swap the card. SIMs are hot-pluggable, so calls on the other three ports carry on. The gateway can sit on a desk or go into a 19-inch rack next to the PBX and switch.
Where the TG400L fits in Saudi Arabia
- Sales teams at distribution and contracting companies sharing company mobile numbers on desk phones.
- Clinics and medical centers with a mobile booking number answered at reception, plus SMS reminders.
- Field service companies reaching customers from mobile numbers they already recognize.
Connecting to your PBX
Yeastar's official guide connects a TG400 to a P560 as a peer trunk, then routes outbound calls through a chosen SIM and sends inbound calls to different destinations by carrier. The gateway also works with S-Series and Yeastar cloud PBXs, and joins a PBX in peer, register or account mode. LTE bands depend on the module type.
TG400L or TG800L?
The TG400L has four SIM ports and one LAN port. The TG800L doubles that to eight SIMs and adds a WAN port next to the LAN port. Start with the TG400L for a mid-size team; choose the TG800L when you need more than four mobile numbers.
Frequently Asked Questions
Can I send SMS from a computer?
Yes. From the web interface you text one number or a group, schedule messages, and read replies in the inbox or by email.
How is the TG400L different from the TG200L?
SIM capacity: four on the TG400L, two on the TG200L. Software and features are the same.
Specifications
- Model: TG400L
- Series: Yeastar TG Series VoIP 4G Gateway
- Mobile ports: 4 × 4G LTE
- Cellular network: 4G LTE with VoLTE (LTE module); bands depend on module type
- SIM cards: One SIM per port, hot-pluggable, SIM PIN supported
- Data over SIM: Not supported
- Ethernet: 1 × 10/100 Mbps LAN (RJ45)
- Signaling: SIP, IAX2
- Transport and encryption: UDP, TCP, TLS, SRTP
- Voice codecs: G.711 A/μ-law, G.726, G.729A, GSM, ADPCM, Speex
- DTMF: RFC 2833, SIP INFO, in-band
- Echo cancellation: ITU-T G.168 LEC
- Call directions: VoIP to mobile (termination), mobile to VoIP (origination)
- PBX trunk modes: Account, Register, Peer (service provider)
- Call features: SIM groups with balance strategy, per-SIM call and monthly limits, AutoCLIP, call forwarding and CLIR (carrier dependent), two-stage dialing
- SMS and USSD: Send/receive SMS, bulk SMS, up to 300 characters (ASCII or Unicode), SMS to email and email to SMS (up to 10 recipients), HTTP API, USSD
- NAT traversal: Static NAT, STUN
- Network features: DHCP, static IP, DDNS, firewall, OpenVPN, QoS, static routes, VLAN
- Management: Web GUI, HTTP, FTP, TFTP, SSH; firmware via HTTP or TFTP
- Power: AC 100–240 V (power cord)
- Operating temperature: 0–40°C
- Storage temperature: -20 to 65°C
- Humidity: 10–90% non-condensing
- Mounting: Desktop or 19-inch rack
Features
- 4 × 4G LTE ports with VoLTE: four mobile numbers shared by the whole team from desk phones.
- Balance strategy across SIMs: outbound calls spread out instead of draining one SIM's bundle.
- Per-SIM monthly minute limits: keep usage inside each operator plan.
- Scheduled bulk SMS up to 300 characters: reminders and customer notices sent from a browser.