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Device Management
Edit External H.323 SBC Dialog
Add External H.323 SBC Dialog
The following table describes the fields in the Add External H.323 SBC dialog.
Note: SBC configuration
Only H.323 SBCs are added to the External H.323 SBC page. SIP SBCs are configured as SIP peers
(see External SIP Peer) and/or on a per-site basis (see Edit Site Dialog).
H.323 SBCs that are added to the External H.323 SBC page are reached by prefix-based dialing
(rule 4 of the default dial plan; see The Default Dial Plan and Suggestions for Modifications).
SBCs to be reached by a dial rule using the Resolve to IP address action (rule 6 of the default dial
plan) are configured on a per-site basis (see Edit Site Dialog).
In general, H.323 SBCs should be configured on a per-site basis, so that calls to endpoints outside the
enterprise network are routed to the SBC assigned to the originating site.
Column Description
External H.323 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 H.323 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 assigned to this SBC. Required.
Enter a single prefix (44), a range of prefixes (44-47), or multiple prefixes
separated by commas (44,46)
The Dial services by prefix dial rule in the default dial plan routes calls to the
assigned prefix(es) to this SBC for resolution.
Strip prefix If selected, the system strips the prefix when a call that includes a prefix is
routed to this SBC.
Postliminary A postliminary is an executable script, written in the Javascript language, that
defines dial string transformations to be applied before querying the SBC.
Enabled Lets you turn a postliminary on or off without deleting it.
Script Type (or paste) the postliminary script you want to apply. Then click Debug
this script to open the Script Debugging Dialog for
Preliminaries/Postliminaries and test the script with various variables.