Altera Telecom Turkey

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General office

Altera Telecom
Abidin Daver Sokak 5/6 ?ankaya
Ankara
,6050
Turkey

Phone: 0312 441 49 99
Site: http://www.ipoptel.com

Internet Telephony Service Provider

Phone To Phone

Cisco Systems

Billing system of own development

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Echo cancellation module VPMADT032

VPMADT032 echo cancellation module is meant to be used with the Digium IP telephony boards; it provides echo cancellation for configurable long "tail" of up to 128 ms (1024 samples) simultaneously for all ports of the board. All IP-PBX Asterisk servers, connected to the telephone network (PSTN) have one common problem, which is "hybrid echo" - echo obtained due to the difference in the load-wire and four-wire telephone circuits. Echo appears as a distorted reflection and a detainee of the caller's voice, who is subscribed to IP-PBX Asterisk while talking to PSTN subscribers.

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