Amazon.com : T1 Card E1 Card,Te420 ISDN Pri Voice Board with 4 E1/T1 Ports,te420e Asterisk Card,PCI-E,Issabel FreePBX for VoIP Phone System IP PBX : Office Products
C-DTU, Single Port, E1/T1 (PRI) Digital Card for IP PBX-C302/C503 - FS.com
4 Port T1/E1/PRI ISDN Simulator
Up to 64 channels modular VoIP SBC with 1 PRI T1/E1 port, expandable by 2 Modules (BNMO-XX), 12 RJ45 slots, Dual NIC and 2 sessions free - UCExperts
Yeastar TE200 PRI Gateway | 2 ISDN PRI Port Support and Inbuilt Firewall
OpenVox FD140 4 Port T1/E1 PRI or BRI-ISDN Interface Failover Box, 1U
Amazon.com : ISDN PRI Card,1 Port T1 Card E1 Card,Asterisk FreePBX Issabel,PCI Express (PCI-E) Connector,SIP Phone System : Office Products
Cisco HWIC-2CE1T1-PRI 2-Port Channelized T1/E1 & PRI HWIC (High-Speed WAN Interface Card)
Connecting Fast Ethernet-PRI Network Modules
High Density E1 / T1 PRI (Primary Rate Interface) VoIP Gateway | Xorcom - IP PBX (Private Branch Exchange) Developer & Manufacturer, Multi-Tenant PBX, Hotel PBX, Virtual PBX, Call Center PBX / PABX
Sangoma 2 Port PRI Card, E1, Linux & Windows
Allo.com - 4 Port PRI Card (PCI/PCIe Interchangable)