Is it true that the quality of communication is worse when using a GSM gateway in a virtual PBX than with direct SIP?

Question

Telephony

The technical support of the telephony service claims that the GSM gateway is to blame for the poor quality of communication. Like, go to the SIP-line and you will be happy. Is it true?

Answer 1

It depends on a lot. I would not flog a fever. If you are using a GSM gateway to connect to the SIP server, then it may actually be better to go directly. Although it depends on the codecs that are used for voice transmission.
If there is a comparison of GSM communication with SIP, then I would vote for GSM. All the same, SIP is not the best connection in the world. Those. no, everything is cool, but not when, for example, a mobile phone is used for talking. In general, everything is not so clear.

Answer 2

Your own gateway is no worse and no better than a GSM-GSM call in any case.
Operator SIP, provided that the call comes from a GSM subscriber is no better and no worse than GSM - GSM, but for calls not to/c GSM it should be better.

Answer 3

In this case, it depends more not on the equipment, but on the quality of the connection of the GSM or IP channels.