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If they are not co-located you can still use QSIG over a PTP T1 or you can use SIP trunking between the 2. &nbsp;You may lose a feature or 2 with SIP.
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If they are not co-located you can still use QSIG over a PTP T1 or you can use SIP trunking between the 2.  You may lose a feature or 2 with SIP.

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Thank you for the answers.<br />
<br />
We currently have numerous overlapping extensions on either side. Both systems are usign 4 digit dialing. &nbsp;We would like to set it up so that a 5th preceeding digit will dial the number on the other system. Will this be possible to do with the setup you have described?
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Thank you for the answers.

We currently have numerous overlapping extensions on either side. Both systems are usign 4 digit dialing.  We would like to set it up so that a 5th preceeding digit will dial the number on the other system. Will this be possible to do with the setup you have described?

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Thank you. This has been very helpful.
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I have two phone systems that I would like to be able to talk to each other. One is a Mitel system that has approximately 400 phones on it. The other is a Cisco system with a couple thousand phones. I am looking for some type of bridge to allow 4 or 5 digit dialing between the 2 systems. <br />
Any recommendations as to what I should be looking at.
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I have two phone systems that I would like to be able to talk to each other. One is a Mitel system that has approximately 400 phones on it. The other is a Cisco system with a couple thousand phones. I am looking for some type of bridge to allow 4 or 5 digit dialing between the 2 systems. 
Any recommendations as to what I should be looking at.

voip pbx bridge

IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN). Using the Internet, calls travel as packets of data on shared lines, avoiding the tolls of the PSTN. The challenge in IP telephony is to deliver the voice, fax, or video packets in a dependable flow to the user.