In your opinion, are there inherent integration benefits to staying with Ericsson (they recommend the MX ONE) rather than working with a local vendor with another platform (Avaya, ShoreTel and Cisco are well represented in the area)?
Not only does minimal vendor access cause concerns, but Ericsson is using H.323 call signaling and I understand that SIP is becoming the standard of choice. Would this affect our investment and future interoperability between systems?
There are gateways that work between H.323 and SIP, so in theory, you could use anything on the U.S. end that you wanted. But you will certainly want to verify interoperability with any gateway vendor you choose. SIP is becoming the most popular protocol and will provide additional options and benefits for your roaming and remote users. Some of the newer gear includes a conversion gateway inside the box, so you may not even need an external gateway. The conversion gateway may add a tiny amount of latency, but SIP is very quick and sets up a type of virtual session to help speed things up.
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