Inter-Tel Axxess User Manual
Page 177
Page 161
System Features
AXXESS
®
ADMINISTRATOR’S GUIDE – January 2004
IP Devices and Local Loop Support
The following diagram illustrates a remote site with an MGCP gateway.
FIGURE 10.
Example of a Remote Site without an MGCP Gateway Application
FIGURE 11.
Example of a Remote Site with an MGCP Gateway Application
NOTE:
The MGCP gateway is intended to connect to the PSTN. Connecting the MGCP gate-
way to single-line ports on other phone systems is currently not supported.
When configured with an MGCP Gateway, you can program the system so that when 911 is
dialed from an IP device, the calling name and number associated with the IP device, not the
system, is sent to the 911 operators. See the latest version of the IP Devices Installation Man-
ual for details.
IPRC
Axxess System
PSTN
IP NETWORK
IP Endpoint
911
Operator
Located in Orange, CA
Caller ID Display:
714-283-1600
480-961-9000
Located in Phoenix, AZ
480-961-9000
Remote Site
Caller dials 911
In Phoenix, AZ
IPRC
Axxess System
PSTN
IP NETWORK
IP Endpoint
911
Operator
Located in Orange, CA
Caller ID Display:
714-283-1600
714-283-1600
Located in Phoenix, AZ
480-961-9000
Remote Site
MGCP
Gateway
(i.e., AudioCodes)
Caller dials 911
In Orange, CA
CAUTION
If an IP or SIP device user dials 911 from a remote location and an MGCP gateway is not
present and configured properly, the call will be placed from where the telephone system is
located. Because 911 services use Caller ID to help locate the caller, emergency service
could be misdirected or delayed. Also, the 911 service contacted may be local to the sys-
tem, but not to the IP or SIP device. All IP and SIP device users should be alerted to this
situation and instructed to use a local telephone line for placing emergency calls if an
MGCP gateway is not present and/or functioning properly. Also note that IP and SIP
devices will not function in the event of a power failure at either the local site or the system
location. Inter-Tel will not be held responsible for any problems resulting from an unavail-
able line that is connected to the MGCP gateway. Inter-Tel also recommends that users reg-
ularly test the MGCP gateway for dial tone.