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Blog posts tagged with 'analog'

Openvox A1200P A800P A800E A400P A400E

Interchangeable 12 Port, 8 Port and 4 Port Analog Interface Cards – Openvox A1200P0012, A800P80, A800E44, A400P04, A400E01

VOIP projects mostly require some form of interconnectivity with analog trunks and analog extensions. Analog Interface cards are used to provide that interconnectivity by converting IP into analog signals and vice versa.

Analog trunks are the telephone lines coming from public telephone exchanges and terminating on the user premises which enables users to dial out one outgoing call or receive one incoming call (per line), through the PSTN network. One needs FXO cards/FXO ports to interface the analog trunk lines with IP Telephony server/soft-switch.

Analog extensions refer to analog telephones/fax machines and other analog devices used at the user end. In many projects, it may not be feasible to replace all the analog phones with IP phones and hence users may want to retain some analog phones in their VOIP environment. One needs FXS cards/ FXS ports to connect the analog phones/fax machines with IP Telephony server/soft-switch.

The analog interface cards can be inserted into an empty PCI or PCI Express slot in a computer/server containing the IP Telephony software (IP PBX). Though the below mentioned cards are populated with certain popular configurations, they have a modular design. It is possible to remove individual FXO/FXS modules and replace them with FXS/FXO modules, if required. 

The A1200P0012 is an 12-port base card that is populated with 12 FXO modules. So, one can connect up to 12 CO lines/ PSTN lines with this card. 

The A800P80 is an 8-port base card that is populated with 8 FXS modules. So, one can connect up to 8 FXS analog stations (like analog phones) with this card. 


The A800E44 is an 8-port base card that is populated with 4 FXS modules and 4 FXO modules. So, one can connect up to 4 analog phones (FXS) and 4 trunk lines (FXO) with this card.


The A400P04 is an 4-port base card that is populated with 4 FXO modules. So, one can connect up to 4 trunk lines (CO/PSTN lines) with this card. 


The A400E01 is an 4-port base card that is populated with 1 FXO module (expandable up to 4 FXO modules in future). So, one can connect up to 1 trunk line with this card.


By using these cards along with an open-source PBX software like Asterisk, Trixbox, Elastix, FreeSWITCH, Yate, PBX in a Flash and even some proprietary softwares, it is possible to build your own IP PBX and connect it to analog trunk lines/analog extensions using the analog interface cards. By using a single PCI/PCI-Express slot and an analog trunk card(A1200P), it is possible to make up to 12 simultaneous calls over the PSTN network. Some of these cards support the latest PCI-Express standard, but others are compliant with PCI 2.2 (3.3V and 5V PCI slots). 


These cards can be used for IP PBX applications or Voice Mail/IVR applications. They can be used in small companies/ larger companies, service industries, manufacturing plants and practically anywhere else where open-source PBX projects are deployed. 

{OpenVox A1200P0012} {OpenVox A800P80} {OpenVox A800E44} {OpenVox A400P04} {OpenVox A400E01}

Openvox D110P D110E D410P ACC1002

T1 lines are digital lines and are quite popular in the United States with each line supporting up to 23/24 voice (and data) channels. Installation and usage is very simple as one can make/receive 23/24 simultaneous calls using a single T1 line. J1 lines are similar to T1 lines, and are used in Japan. E1 lines are similar to T1 lines and are used in Europe/Asia. E1 lines support up to 30 channels of voice/data in a single line, and hence every port of these digital cards supports up to 30 channels. 


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. 

{OpenVox D110P} {OpenVox D110E} {OpenVox D410P} {OpenVox ACC1002}

OpenVox A2410P A1610P A810P

Interchangeable, Expandable Analog Interface Cards – Openvox A2410p, A1610p, A810p & Expansion modules – FXO400, FXS400

There are two types of analog lines that need to be interfaced with IP Telephony Servers in most of the VOIP installations - 

Analog lines from CO/POTS (Telephone office), also called as Trunk lines - FXO
Analog lines from Analog telephones, also called as Extension lines - FXS

The trunk lines are the lines that come from an external telephone exchange and each of them allow a caller to make either one incoming call/receive one outgoing call, using each of them. To interface these FXO Lines with IP Telephony server, Analog Trunk interface cards (FXO Cards) are required. 

There are many analog devices that need to be connected to the VOIP world. For example - analog phones, fax machines, etc. To connect these devices to the IP Telephony server (through LAN), one requires Analog Extension Interface cards (FXS Cards).

The Openvox A2410p, A1610p and A810p base cards offer an expandable platform over which one can connect any combination of FXO400/FXS400 modules in order to accommodate the number of FXO/FXS ports required. 

The FXO400 module has four FXO ports and FXS400 module has four FXS ports.

The A2410p Card can accommodate a maximum of 24 ports. That means, a maximum of six FXO400 or FXS400 modules can be connected to it, in any combination. 

The A1610p Card can accommodate a maximum of 16 ports. That means, a maximum of four FXO400 or FXS400 modules can be connected to it, in any combination. 

Similarly, the A810p Card can accommodate a maximum of 8 ports. That means, a maximum of two FXO400 or FXS400 modules can be connected to it, in any combination. 

All these cards can be connected with a fewer number of modules initially and more modules can always be added later on, when required. Based on which model is selected, the cards can be fixed into an empty PCI slot/ PCI express slot present in a computer/server. The cards work very well with most of the open-source and proprietary IP PBX/ Soft-switch models like Asterisk, FreeSwitch, Trixbox, Elastix, Yate, PBX in a Flash, etc. They also work with IVR (Interactive Voice Response) and VOIP gateway applications.   

It is possible to buy fixed configuration cards (that cannot be expanded). But, when there is a need for expansion, not only additional cards are required, but additional (free) PCI/PCI-Express slots are also required to connect them. With expandable cards, more FXO/FXS ports can be achieved by just connecting additional modules to the base cards. Of course, expansion is limited to the capacity of each card. The FXO400/FXS400 connected to them are inter-changeable. For example, one can initially populate a base card with two FXO400 modules and then later on remove them and fix two FXS400 modules.  

These analog interface cards can be used in small businesses, large corporates, telco companies, schools, hospitals and anywhere else where analog trunk lines/analog phones need to be connected to the VOIP installations. These analog interface cards act as an interface between the IP and analog world and hence convert analog signals to IP and vice versa.


{OpenVox A2410P} {OpenVox A1610P} {OpenVox A810P}