RJ45 S/T ports1 to 8 BRI interfacesTerminate S/T BRI circuits on RJ45 ports, then select B100, B200, B400, or B800P by port count and call capacity.
Server-Integrated ISDN BRI Access for Asterisk PBX
Add BRI cards when the PBX server must connect directly to ISDN S/T circuits. The card keeps BRI line access inside the server chassis, so teams can consolidate legacy ISDN trunks without placing an external BRI gateway between the carrier line and Asterisk.
- Interfaces
- S/T BRI
- Expansion
- PCI / PCIe BRI Card
- Range
- 1 to 8 Ports
Map ISDN BRI connections
OpenVox BRI cards add S/T-based ISDN line and terminal connectivity directly to an Asterisk PBX server, keeping BRI access inside the host instead of deploying a separate external gateway. Select the right model by the BRI interface role, required port density, and concurrent call capacity.
- Use TE mode for carrier-delivered S/T BRI service, NT1 handoff, or office ISDN lines presented to the PBX room.
- Use NT mode for ISDN BRI phones, test handsets, PBX trunk ports, or other TE-side BRI terminals.
- Choose B100, B200, B400, or B800P based on how many BRI ports the server must terminate.
Check BRI interfaces and server fit
After the BRI role is clear, confirm the S/T interface mode, RJ45 cabling, host slot, B800P power requirement, and optional hardware echo cancellation before ordering.
RJ45 S/T ports1 to 8 BRI interfaces
TE / NT interface roleCarrier line or BRI terminalUse TE mode for carrier-delivered S/T service; use NT mode when the PBX server presents BRI access to phones or other TE devices.
PCI / PCIe host interfaceModel-specific slot fitChoose PCIe or PCI variants for B100, B200, and B400. Select B800P when 8-port density is required, noting that it currently supports PCI only, not PCIe.
BRI power jackB800P external power onlyPlan an external power connection for B800P to avoid insufficient power. B100, B200, and B400 do not require an external power lead.
Hardware echo cancellationOptional DSP echo processingChoose the hardware echo cancellation option when the BRI deployment needs dedicated DSP echo handling on the card.
Choose the BRI density tier
Choose the model by the number of S/T BRI ports the PBX server must terminate, then confirm the available host slot and power requirement. B100, B200, and B400 are available for PCIe or PCI server builds; B800P is the higher-density PCI option and requires external power.
BRI card model
B100
Use B100 when the PBX server needs a single S/T BRI port for one line handoff or a small terminal-side test connection.
- Capacity tier
- Single-port BRI access
- Port ceiling
- 1 BRI port
- Host interface
- PCIe or PCI variant
- External power
- Not required
- Interface
- S/T BRI
- Deployment role
- Single-line BRI termination
BRI card model
B200
Use B200 for compact PBX builds that need two S/T BRI ports while keeping line access integrated inside the server.
- Capacity tier
- Two-port BRI access
- Port ceiling
- 2 BRI ports
- Host interface
- PCIe or PCI variant
- External power
- Not required
- Interface
- S/T BRI
- Deployment role
- Small-office BRI integration
BRI card model
B400
Use B400 when several S/T BRI ports must be consolidated in one PBX server without adding an external gateway.
- Capacity tier
- Four-port BRI access
- Port ceiling
- 4 BRI ports
- Host interface
- PCIe or PCI variant
- External power
- Not required
- Interface
- S/T BRI
- Deployment role
- Multi-line BRI consolidation
BRI card model
B800P
Use B800P for the highest BRI port density in this family when the PBX server provides a PCI slot and external card power.
- Capacity tier
- Eight-port BRI access
- Port ceiling
- 8 BRI ports
- Host interface
- PCI only
- External power
- Required
- Interface
- S/T BRI
- Deployment role
- High-density BRI termination
Match BRI requirements to a card
Select the BRI card by the number of S/T ports, expected call capacity, and the server slot available. Then confirm RJ45 cabling and power requirements before ordering.
| Specification | B100 | B200 | B400 | B800P |
|---|---|---|---|---|
| BRI connection basics | ||||
| Connection role | Bring S/T-based ISDN BRI lines or BRI terminal devices directly into the PBX server. | |||
| S/T interface | Each S/T BRI circuit uses a 4-pin interface presented through RJ45 cabling. | |||
| TE / NT mode | Use TE mode for carrier or NT1 handoff. Use NT mode for ISDN BRI phones, test handsets, or other TE-side terminals. | |||
| Model-by-model selection | ||||
| BRI port density | 1 BRI port | 2 BRI ports | 4 BRI ports | 8 BRI ports |
| Simultaneous calls | Up to 2 calls | Up to 4 calls | Up to 8 calls | Up to 16 calls |
| Host bus | PCIe or PCI model | PCIe or PCI model | PCIe or PCI model | PCI only |
| RJ45 mapping | 1 RJ45 for 1 BRI port | 1 RJ45 for 1 BRI port | 1 RJ45 for 1 BRI port | 1 RJ45 carries 2 BRI ports |
| Cabling | No splitter required | No splitter required | No splitter required | SP splitter cable required |
| External power | No external power | No external power | No external power | External power required |
| Best fit | Single-line BRI termination | Small-office BRI integration | Multi-line BRI consolidation | High-density PCI BRI build |
| Before you order | ||||
| Port count | Count the S/T BRI ports that must terminate in the server. | |||
| Server slot | Choose B800P for 8-port density. Confirm a PCI slot because B800P does not support PCIe. | |||
| Accessories | Add SP splitter cables and external card power when specifying B800P. | |||
Know when to choose BRI Cards
BRI Cards fit PBX servers that need internal ISDN S/T access. If the site needs analog endpoints, PRI-scale trunks, standalone gateway operation, or mixed interfaces, another OpenVox product family may fit better.
Direct BRI chassis deployment
- The PBX host terminates S/T BRI lines inside the server chassis.
- The team owns DAHDI, driver, and server-side call control planning.
- The build is centered on direct ISDN access, not network adaptation.
Dedicated analog card alternative
- The site needs FXS or FXO rather than S/T BRI.
- Phones, fax devices, or PSTN lines should terminate on analog modules.
- The requirement belongs to the analog card family.
Digital trunk alternative
- The access side is T1, E1, or J1 rather than ISDN BRI.
- PRI-scale carrier termination is a better fit than BRI density.
- The project belongs to the digital card family.
Hybrid card alternative
- The chassis needs BRI plus analog or digital modules.
- One modular host should carry multiple interface families.
- A mixed-interface build is more appropriate than a single BRI card.
Get a BRI Card Recommendation and Quote
Share your S/T port count, TE or NT role, server slot, call capacity, and echo cancellation needs. OpenVox can confirm the right B100, B200, B400, or B800P configuration and prepare a quotation for your PBX build.