Polycom 3725-76302-001LI Edit External SBC Dialog Box

External SBC Device Management

Polycom, Inc. 129

Edit External SBC Dialog Box

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 292).

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 Box for Preliminaries/Postliminaries

and test the script with various variables.

Table 5-24 Add External SBC dialog box

Column Description