User guide

Chapter 25: Enterprise VoIP Network Management
352 MAXCS ACC 6.5 Administration Manual
When an extension is added to a member system, this extension can be propagated to
other networked systems in the VoIP domain automatically. This extension is recognized
as a remote extension by other systems. When a call is made to a remote extension, it
is redirected to the remote system over IP automatically.
Note: No virtual extension configuration is needed to forward the call. The VoIP domain
uses the User directory combined with the IP dialing table to resolve multi-site
routing.
An extension can call a remote extension when invoking basic features such as an
extension-to-extension call, call transfer, conference, Zoomerang, and so on. Advanced
features, such as silent monitoring and barge-in, between sites are NOT supported.
PSTN Failover When the TCP/IP Network is Down
Enterprise call routing works with a SIP-tie trunk, but at times the TCP/IP network may
be down. To provide failover for these times, you can assign a PSTN number to each
MAXCS in Enterprise Manager. The default PSTN number is the main number of each
MAXCS site.
To enable global extension rerouting,
1. In Enterprise Manager click the Servers button, and then the Information tab.
2. In the Global Extension Re-Routing panel, check Re-route outgoing calls when
SIP tie-trunks are unavailable.
3. Enter a PSTN number in the PSTN Number for Re-routed Incoming Calls field,
if different from the main number of the MAXCS site. If nothing is entered in this
field, the main number of the MAXCS site is used. If you enter a number, use the
E.164 format.
When failover is needed, MAXCS dials the destination site number with the proper call
prefix and area code or country code. On the call destination site, the call comes into the
AA. The AA receives the extension number the call is directed to and rings the extension.
Note: The rerouted call may hear 1 or 2 seconds of auto-attendant announcement
before the call is sent to the extension.
The Scope of an Extension in the VoIP domain
When an extension is added to a system in MaxAdmin, it can be defined as Global by
checking the Global extension box. If this box is not checked, the newly added
extension is a local extension.