As an IT admin or business owner, without any doubt, face some concerns and considerations at the moment to replace the outdated, legacy PBX with a new Unified Communications software-based solution. One of the big questions to answer is “should we go hosted or on-premise?”. In this three-part blog post series, we’re going to go list the requirements, advantages and possible disadvantages of these two deployment options.
“On Premise” term, refers to PBX installations within the local network (LAN). In this case a modern software based PBX such as Elastix 5 powered by 3CX, is usually installed on a dedicated server machine, appliance or on a virtual machine. Peripheral devices such as phones, gateways, and softphones are normally installed within the same local network and interact directly with the PBX. Traditional phone lines (ISDN, PSTN, GSM) or VoIP lines (SIP Trunks) can be connected, but so can remote extensions physically placed in remote business locations. Internet connectivity allows for outward data traffic.
Advantages of an On-premise solution
- Direct control of the machine hosting the PBX installation.
- Local direct connectivity for peripherals such as telephones, gateways and traditional lines.
- Direct access to business applications like ERP applications, CRM and Databases that reside within the local network note necessarily living on the Cloud.
- In case Internet connectivity is missing, due to technical problems, the PBX continues to operate by exploiting local backup routes (traditional lines).
- Voice traffic over the data line is reduced to exchange data with the VoIP provider and any remote extensions only.
- In case of large installations with a significant number of extensions, especially where features such as call recording are used, the on-premise solution usually guarantees better efficiency.
Possible disadvantages of an On-premise solution
- Increased traffic on the internet data line to connect to CRM applications and in Cloud databases, or to connect remote extensions (softphone and remote physical phones) and smartworkers.
- With some solutions, it is possible that more time will be needed (and consequently, higher costs) for maintenance and updating.
- ISP providers as well as routing and Firewall equipment must be chosen and evaluated more carefully.
- May encounter possible issues related to the presence of router / firewall equipment supplied by ISPs that do not comply with the specifications of the SIP protocol or may even inhibit the correct communication with VoIP providers.
In the next post we will cover pros and cons of a Cloud PBX!