Enterprise VoIP and SIP trunks: what should your business measure?
Extensions, simultaneous calls and telephone numbers describe different requirements. Use them to plan a controlled business telephony migration.
Translate extensions into call capacity
A business with one hundred employees does not necessarily need one hundred concurrent external calls. Establish busy-hour demand for sales, support and procurement teams. Review inbound and outbound traffic, call duration and shift changes separately. Headcount alone is a weak basis for a voice proposal.
Separate signalling from the media path
SIP is a signalling protocol for establishing and managing sessions. SIP support in a PBX does not prove interoperability with every operator configuration. Include PBX version, codecs, DTMF, NAT, firewall ownership and two-way audio in an acceptance plan. Agree what will be tested before making a migration commitment.
Plan numbering and continuity
Document required Turkish numbers, the wish to retain existing numbers, inbound menus and out-of-hours routing. Allocation and portability eligibility depend on documentation and technical review. Assign responsibility for backup connectivity, power loss and alternative routing. A second connection only helps if the failover process is understood and tested.
Treat migration as a process
Start with a small pilot group. Verify inbound and outbound calls, displayed caller identity, two-way audio and busy-hour behaviour. Keep a rollback plan. Confirm support availability and response objectives in the agreement; a website animation does not establish a service-level commitment.
Prepare for the discussion
- PBX manufacturer, model and software version
- Sites, numbers and busy-hour concurrent calls
- Internet links, resilience and firewall owner
- Pilot users, acceptance scenarios and migration schedule