Setting Up The Local Gateway - Nortel BCM50 Configuration Manual

• Force G.711 for 3.1k audio - When enabled, the system forces the VoIP trunk to use the
G.711 codec for 3.1k audio signals such as modem or TTY machines.
4
Set up the local gateway parameters.

Setting up the local gateway

The call signaling method used by the local gateway defines how the BCM prefers call signaling
information to be directed through VoIP trunks. Call signaling establishes and disconnects a call.
You set this information in the local gateway panels.
If the network has a gatekeeper (H.323 trunks, only), the BCM can request a method for call
signaling, this request is granted depending on the configuration of the gatekeeper. Ultimately, the
gatekeeper decides which call signaling method to use. Refer to
Gatekeeper configuration" on page
The following path indicates where to access the local gateway in Element Manager:
• Element Manager: Configuration > Resources > Telephony Resources > IP Trunks.
1
In the bottom panel, select the H323 Settings or SIP Settings tab.
2 Choose the settings that you need for your system:
• Fallback to circuit-switched: define how you want the system to handle calls that the
system fails to send over the VoIP trunk.
Note: Enabled-TDM enables fallback for calls originating on digital telephones.
This is useful if your IP telephones are connected remotely, on the public side of
the BCM network, because PSTN fallback is unlikely to result in better quality of
service in that scenario.
• Forward redirected OLI - If the box is selected, the OLI of an internal telephone is
forwarded over the VoIP trunk when a call is transferred to an external number over the
private VoIP network. If the box is cleared, only the CLID of the transferred call is
forwarded.
• Send name display - When selected, the telephone name is sent with outgoing calls to the
network.
• Remote capability MWI - This setting must coordinate with the functionality of the remote
system hosting the remote voice mail.
• Call Signaling: Determine how the calls are delivered over the network:
— Direct: call signaling information is passed directly between endpoints.
Note: You will need to set up remote gateways
page
— Gatekeeper Resolved: all call signaling occurs directly between H.323 endpoints.
This means that the gatekeeper resolves the phone numbers into IP addresses, but the
gatekeeper is not involved in call signaling.
389.
385).
Chapter 44 Configuring VoIP trunk gateways
("Setting up the local gateway" on page
("Setting up remote gateways" on
383)
"VoIP interoperability:
Networking Configuration Guide
383