Voice Over IP
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Our current system is a Pentium 3 450 PC with an 8gig hard drive 64meg of memory and 2 4port Dialogic PCI cards connected to our Vodavi Triad PBX. It runs a DOS program called Corporate Office v8.2, I beleive was also by Vodavi.
I have looked through the known woking hardware list and see nothng of these cards. I am surprised as these were very popular in the day.
Does anyone know if Asterisk will work with these, or of another OSS/cheap solution?
Thanks,
Mike P.
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If the latter:
Do you know how the Vodavi communicates mail box id to the voicemail? If it uses something other than in-band DTMF, then you might find it a little tricky to get asterisk to integrate. Does the old DOS e-mail turn on message waiting lamps or give stutter dial tone to tell users they have a message waiting? If so, you may find it hard to get asterisk to duplicate this function with the Vodavi Triad PBX.
I am sure the Dialogic cards will be analogue. At least you say they are PCI so they may still have some value - perhaps on ebay. There are dealers who sell used Dialogic cards, but you won't get much that way I'm sure.
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Yes, it does turn on a MSG lamp on the phones.
Not sure about communication between it and the PBX.
Main reason for needing to upgrade is getting numerious reports from users about messages getting cut off ofter 5-10seconds.
Ran defrang and scandisk on the drive but it comes up clean.
Does it include parameters for the Dialogic Control Block (DCB)?
I don't have access to the old Dialogic documentation right now, so the help I can give may be limited, but if the problem is talk-off then the solution is usually to make the system less sensitive to detection of tones - that means increasing the ontime for tone definitions or increasing the time a DTMF tone must be present which is a parameter in the DCB. You have to get the balance right between making it sensitive enough to detect hangup but not over-sensitive so it misinterprets speech as a hangup signal. Some PBX's send a special DTMF tone to indicate hangup by the calling party (e.g. # tone) but others just send dial tone.
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Voice Over IP
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Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN). Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).