Digital VoIP Gateways: Plan a PRI/BRI-to-SIP Migration
Yenra | Prepared October 3, 2026
Guide: https://yenra.com/digital-voip-gateway/

Purpose: prepare a digital PBX-to-SIP migration brief.
Instructions: complete with the PBX maintainer, gateway supplier and carrier.
Use actual manuals and configuration records. This is not a wiring instruction.

PBX/model/card/software / gateway/model/firmware/license:
Digital interface: BRI / PRI; T1/E1; usable bearer channels:
Protocol variant / endpoint roles / framing / line coding / approved cable:
Clock reference / recovered-clock path / fallback:
SIP carrier profile / auth method (no secrets) / number formats / codecs:
Gateway sessions / media processing capacity for actual call mix:
Feature dependencies: transfers / tones / identity / fax / special equipment:
Owners: PBX / gateway / network / carrier / change approver:
Current configuration backup and baseline call results:
Temporary test route or subset:
Cutover time / provider transfer reference / support route:
Rollback trigger / person authorized / actual reversibility limits:

Acceptance: timestamp, call IDs both sides, expected/observed result:
Digital link healthy:
Inbound / outbound / audio both ways / number presentation:
Keypad tones / hold-resume / assisted and blind transfers:
Voicemail / fax if used / busy / unanswered / planned concurrent calls:
Planned restart recovery / approved emergency-location verification:
Normal configuration or rollback verified:

Fictional bottleneck exercise: digital 8, gateway 16, SIP 12, media 10.
For one call per bearer in the stated mix, capacity = min(8,16,12,10) = 8.
Not a device rating. Evaluate transfers and conferences separately.

Sources and instructions: follow the guide links for context.
https://documentation.media5corp.com/display/DGWLATEST/DGW%2BSoftware%2BConfiguration%2BGuide