System requirements: PBX

Item

Requirement

PBX environment

  • PBX that your organization's media gateway supports
  • DSP resources to support call processing and voice traffic on the PBX voice network
  • T1/E1 ISDN-PRI trunks to support the anticipated voice traffic between the PBX and media gateway
  • QSIG T1/E1 ISDN-PRI tie lines between the media gateway and PBX
  • use of Coordinated Dial Plan, Universal Dial Plan, or similar routing

PBX hardware

  • DS1 card that supports T1/E1 ISDN-PRI
  • CAT5e cabling or better to connect trunk lines
  • If you use multiple spans, each span must have connection points to connect the PBX to the media gateway

PBX licensing

capacity and licensing for ISDN, trunks, stations, and QSIG

PRI provisioning

Support for the following provisioning:

  • ISDN-PRI interface
  • B8ZS/ESF DS1 signaling that can transmit at 1.544 Mbps for T1 carriers or HDB3 DS1 signaling that can transmit at 2.048 Mbps for E1 carriers
  • two-way B-channels
  • one D-channel for each T1/E1 span (NFAS is not supported)
  • trunk-to-trunk transfer or tandem switching
  • QSIG

caller ID

  • PBX that is capable of sending and receiving a caller ID of up to 14 digits
  • PSTN trunks (local, long distance, and international) that are capable of sending and receiving a caller ID of up to 14 digits

You might be required to reprovision your organization's PRI spans.

DID

  • one DID per user
  • five DID numbers per 100 users for ANI and DNIS pool numbers
  • one DID for the BlackBerry® Mobile Voice System command number
  • one DID number for the mobile access number
  • one DID number for the conference bridge access number (optional)

Index


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