Karel DS200, Technical Reference And Installation Manual

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DS Series PBX Technical Reference And Installation Guide
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In these type applications, “Frame Relay” or “Leased Line” types of lines are usually
employed for data transfer among remote offices. Making phone calls over these very lines
as well would provide advantage towards cutting communication expenses of a corporation.
The EX200 (8VoIP) card works as a gateway that establishes connection between the
exchange and the IP network. Thanks to the EX200 (8VoIP) card, direct voice
communication can be established without the need for interfaces like FXO, FXS for routers,
which are present in the IP networks.
Since the VoIP applications are software-based ones, basic functions are fulfilled by the DSP
on the card.
By way of its intelligent and capable software the VoIP card supports, G711 and G729
codecs, echo canceller, jitter buffer and etc.
Connection to the EX200B (8VoIP) card is made over the RJ45 Ethernet connection on the
front face of the card.
VII.3.M. EX200 (16 VoIP) VOICE OVER IP MODULE
In addition to the common circuits explained above, there are 16 VoIP channels on the
EX200B (16VoIP) card. Those VoIP channels work in compliance with the H.323 or SIP
protocol.
When the module is utilized as an external line, institutions/corporations possessing several
DS200 series exchanges can establish the infrastructure that enables phone calls over IP
lines by connecting their exchanges to each other over lines of IP network.
In these type applications, “Frame Relay” or “Leased Line” types of lines are usually
employed for data transfer among remote offices. Making phone calls over these very lines
as well would provide advantage towards cutting communication expenses of a corporation.
The EX200 (16VoIP) card works as a gateway that establishes connection between the
exchange and the IP network. Thanks to the EX200 (16VoIP) card, direct voice
communication can be established without the need for interfaces like FXO, FXS for routers,
which are present in the IP networks.
Since the VoIP applications are software-based ones, basic functions are fulfilled by the DSP
on the card.
By way of its intelligent and capable software the VoIP card supports, G711 and G729
codecs, echo canceller, jitter buffer and etc.
Connection to the EX200B (16VoIP) card is made over the RJ45 Ethernet connection on the
front face of the card.
VII.3.N. EX200 (4TWT) SPECIAL DUPLEX LINE
MODULE
In addition to the circuits explained above, there are 4 identical TWT line circuits on the
EX200B (4TWT) card.
Each line has 2-4 / 4-2 wire conversion circuits, a CODEC for digital to analog and analog to
digital conversions in speech channels, and a transformer, as well as DC current detectors
on signaling channels and relays.