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DMA Operations Guide External SBC
116 Polycom, Inc.
See also:
“Device Management” on page 75
“Add External SBC Dialog Box” on page 116
“Edit External SBC Dialog Box” on page 117
Add External SBC Dialog Box
The following table describes the fields in the Add External SBC dialog box.
Table 5-24 Add External SBC dialog box
Column Description
External SBC
Enabled Clearing this check box lets you stop using an external
SBC without deleting it.
Name SBC unit name.
Description The text description displayed in the External SBC list.
Address Host name or IP address of the SBC.
Port The SBC’s port number. Leave set to 1720 unless you
know the unit is using a non-standard port number.
Prefix range The dial string prefix or prefix range for which the
external SBC is responsible.
Enter a single prefix (44), a range of prefixes (44-47), or
multiple prefixes separated by commas (44,46)
If your dial plan uses the Dial services by prefix dial rule
(in the default dial plan) to route calls to services, all dial
strings beginning with an assigned prefix are forwarded
to this SBC for resolution.
If you don’t specify prefixes, the dial plan can use the
Dial external networks by H.323 URL or SIP URI dial
rule or the Dial endpoints by IP address dial rule (both
are in the default dial plan) to contact addresses outside
the enterprise network. The system detects that firewall
traversal is needed and routes the call through the SBC
closest to the caller. This must be configured per site on
the H.323 Routing tab of the Add Site or Edit Site
dialog (see “Edit Site Dialog Box” on page 272).
Strip prefix If selected, the system strips the prefix when a call that
includes a prefix is routed to this SBC.