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Solution Technical Clarification

Sachintha Dias

January 15, 2019 11:26

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Attached diagram for telephone communication requirement. Need to integrate with existing Analog PABX.

Could you please propose me a suitable solution and products for this. Especially the conversation to Analog to IP and IP to Analog.

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  Larry Neblett January 15, 2019 14:57

  The solution is dependent upon the number of phones at each location and their type. You show 1 analog at one building and 1 IP at the other but am uncertain if this is all or if there may be more. 

  The issue is that at the PBX site, the PBX has analog connections of which each represents a possible analog phone connection. Additionally, each connection is unique in that it represents a specific extension. To the building with the IP phone, you need to get from the analog PBX to an IP level. To the building with the analog phone, you need to get from analog to IP and at the other end from IP to analog. 

  To do the analog phone side, you need to peer two devices, an FXO ATA and a FXS ATA. The FXO device sits at the PBX side and the FXS at the analog phone side. The two devices are peered in their settings to one another. 

  To do the IP phone requires just the FXO device at the PBX side. The phone is peered or registered to the FXO device.

   

  The TA410 is the FXO device and the FXS is a TA100. Again, the actual need is dependent on the number of phones and types. While the TA410 is a 4 port device and you only need 2 ports, this is the smallest FXO device in the product line. There is also a TA200 for a 2 port FXS device and even larger if needed. 

   

  I have attached a KB article that helps to explain the PBX to analog phone scenario. 

  https://support.yeastar.com/hc/en-us/articles/218283447-Connecting-TA-FXS-Gateway-to-TA-FXO-Gateway

  I also need to point out that you need to fully understand if the analog aspects of the PBX system and phones are truly non-proprietary analog devices. There are many legacy systems that purport to be analog and while technically they are analog, they do not necessarily follow the same standards that define how the phone company operates their network (PSTN/POTS). They may use different voltages and other signaling methods that make it such that only their phones can be used with their PBX systems. There are some systems that may indicate analog functionality, but are hybrid in that they combine digital signaling with analog voice. The digital signaling will not be conveyed across the IP network. 

  These devices were originally designed around the telephone companies products and If the phones and output/input of the PBX is fundamentally supportive of these standards then you should be OK for getting voice back and forth, but if the PBX has functionality that is beyond simple voice, you may face some challenges with the signaling.