Chapter 4 CS 1000 considerations 39SRG200/400 Release 1.5 Configuration GuideACR for NBWM allows a station-to-station call (that is, a call that does not use a trunk) tooverflow to traditional routes. Overflow can occur if there is insufficient interzone bandwidthavailable to carry the call, or if the QoS has degraded to unacceptable levels. The feature applies tostation-to-station calls between a branch office and main office as well as from one branch officeto another branch office, provided both stations are registered to the same main office.Network administrators who do not want calls to be blocked, yet have a limited amount ofbandwidth available, can use ACR to overflow calls to conventional trunks (PSTN or Tie/MCDN).ACR allows calls to be routed by overflowing them, trading off the capital cost of WANbandwidth against the incremental cost of overflowed calls.Configuring the SRG for Bandwidth Management: NBWM,ADBWM, and ACRTo configure the SRG for NBWM and ADBWM1 Obtain the Virtual Private Network ID and the Zone ID numbers configured at the main office.2 Use Element Manager to enter these numbers in the appropriate fields at Configuration >Telephony > Dialing Plan > Private Network > Dialing Plan - Private Network panel >VoIP subpanel (see Figure 4).Figure 4 Dialing Plan - Private Network panel, VoIP subpanel