DFM Iran

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General office

DFM
shahrakeh jandarmery, etaaty Aev,
Tehran
Tehran ,13145
Iran

Phone: +98 21 8825 180
Phone: +98 935 541 1437

SIP Billing
Voip consulting

Phone To Phone
SIP Softswitch & CPE

Audiocodes
Cisco Systems
Dialogic Based

INPERTEL
Java Based own system
K2 Power Bill
MIND
NACT - UNIX Platform
Our Own ASP Solution

Parsvoip

Persia Telecom

Providers in database: 6433

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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