User's Manual 906 Document #: LTRT-10632
Mediant 800B Gateway & E-SBC
• 'Address': Configure the IP address (or hostname) of the IP PBX. Note that for
the One port: WAN network topology, when the device is assigned a public IP
address, you must use the public IP address (of the Enterprise router) instead of
the private address of the IP PBX, and configure the Enterprise router to forward
VoIP traffic from the device to the IP PBX.
• 'Backup Address': (Optional) Configure the backup IP address (or hostname) of
the IP PBX.
• 'SIP Domain': Configure the SIP domain name used for communication with the
IP PBX. The domain name is used in the following SIP message headers:
♦ Outbound calls: Request-URI and To headers
♦ Inbound calls: From header
• 'Keep Alive': Enable the periodic keep-alive check for multiple IP PBX addresses.
2. Under the Media Ports (Realm) group, configure the media protocol type and ports
used by the device for communicating with the IP PBX:
• 'Media Protocol': Configure the media protocol type (RTP or SRTP).
• 'Base Port' Configure the first media port in the port range.
• 'Number Of Sessions': Configure the number of required media sessions. For
more information on media port ranges and number of sessions, see Configuring
RTP Base UDP Port on page 210.
3. Under the SIP Interface group, configure SIP ports and transport type for
communicating with the IP PBX:
• 'Transport Type': Configure the SIP transport type.
• 'Destination Port': Configure the SIP port used by the IP PBX.
• 'Listening Port': Configure the SIP port used by the device when communicating
with the IP PBX.
4. Click Next; the SIP Trunk page appears (SIP Trunk Page on page 907).
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