A company that needs to make a large number of calls using the PSTN network might as well look at procuring T1 lines for their requirements as they can support up to 30 simultaneous incoming/outgoing voice calls using a single E1/PRI line. Since T1 lines are digital lines, troubleshooting is easier and most of the T1 lines can carry voice along with data.
T1 lines need IP to Digital conversion in order to work in VOIP environments and T1/E1/J1 Digital Cards provide that translation. An IP PBX/Soft-switch can connect to a T1 line using one of the below mentioned digital cards.
Openvox D110P allows to connect a single T1 line to the IP PBX using the PCI interface. It supports single port T1 connectivity.
Openvox D110E allows to connect a single T1 line to the IP PBX using the PCI Express interface. It supports singe port T1 connectivity.
Openvox D410P allows up to four T1 lines to be connected to the IP PBX using the PCI interface. It supports up to 4 port T1 connectivity.
Openvox ACC1002 PCIe raiser card allows full sized PCIe cards to be fixed parallel to the motherboard, allowing the larger PCIe cards to be installed in compact 1U/2U systems/servers.
While D110E supports the latest PCI Express interface, other digital cards support PCI 2.2 standard. These digital cards have a low power consumption and hence do not need separate power supplies. Some of them are half length PRI cards and hence they can fit into compact computer systems. They are very light and hence do not contribute to the weight of the system. Since these Digital cards support E1, T1 and J1 environments, it allows T1 channel banks to connect with E1 circuits.
The T1/E1/J1 Digital cards can be used in corporate companies, industries, hotels, hospitals, shipping companies, transport companies, educational institutions, government companies, and anywhere else where a high volume of voice calls are expected over the PSTN network. These digital cards can enable IP PBX applications, IVR (Interactive Voice Response) systems, Dial-in 'meet-me' conference services, VOIP gateways and calling card applications.
Most of these digital cards are officially certified to be used with Trixbox and can also be used with other IP PBX projects like Asterisk, FreeSWITCH, Yate, PBX in a Flash, Elastix and various other open-source IP PBX/IVR/VOIP gateway applications.