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PBX & Telephony

PBX and VoIP commissioning

Prove call flows, trunks, and voice quality before go-live.

Zi-On
Site
Date
Technician
Reference

Network

  • Voice VLAN, PoE budget, and QoS (EF for media, CS3 for signalling) in place
  • PBX, core, and PoE switches on UPS
  • Phones auto-provision over HTTPS; NTP working

Trunks and numbers

  • SIP trunk registered / authorised; channels match contract
  • Every DID routes to the correct destination
  • Outbound caller ID correct per user and group
  • Emergency numbers work with and without the outside-line prefix

Call flows

  • Ring groups ring correctly and fail over when unanswered
  • Queues, IVR options, and time conditions tested in and out of hours
  • Voicemail-to-email works; default PINs changed
  • Transfers, park, pickup, BLF, and paging work
  • DTMF works into IVR and voicemail (RFC 2833/4733)

Security and quality

  • SIP and admin not exposed to the internet; SBC or provider-IP allow list
  • Strong SIP passwords; failed-login blocking enabled
  • International dialling restricted by class of service
  • Test calls show MOS 4.0 or better, no one-way audio
  • Configuration backup scheduled off-box

Notes / defects

Technician signature

Client / supervisor signature

Zi-On ELV Academy · https://elv.zioninnovates.com/toolkit/checklists/pbx-commissioning