ETSI PRI 13-13
Digital Switching Systems DMS-250 ISDN Reference Manual MWC14 (CSP14)
•
CGNDELV = Secondary CHGDELV = Primary
CGNPISCR = Yes CHGPISCR = No
If CHG is available, CHG is delivered as CGN with PI set to “Allowed”
and SI set to “Network Provided”. If CHG is not available and CGN is
available, PI of the CGN parameter is screened. If PI is “Restricted”,
CGN is not delivered. For any other value of PI, CGN is delivered.
• CGNDELV = Secondary CHGDELV = Primary
CGNPISCR = Yes CHGPISCR = Yes
If CHG is available, the availability of CGN is determined. If CGN is
not available, CHG is delivered as CGN with PI set to “Allowed” and SI
set to “Network Provided”. If CGN is available, the PI of the CGN
parameter is screened. If PI is “Restricted”, CGN is not delivered. For
any other value of PI, CHG is delivered as CGN with PI set to
“Allowed” and SI set to “Network Provided”. If CHG is not available
and CGN is available, PI of the CGN parameter is screened. If PI is
“Restricted”, CGN is not delivered. For any other value of PI, CGN is
delivered.
Standard cause and treatment handling
Table 13-1 lists the cause values in ETSI PRI specifications that do not
apply to North America PRI specifications.
Table 13-1
Cause-to-treatment mapping for ETSI PRI specifications
Cause Treatment
Call awarded and being delivered in
an established channel (7)
Reorder (RODR)
Non-selected user clearing (26) Reorder (RODR)
Quality of service unavailable (49) Reorder (RODR)
A suspended call exists, but this call
identity does not (83)
XPM sends back “Invalid Information
Element Contents”
Call identity in use (84) XPM sends back “Invalid Information
Element Contents”
No call suspended (85) XPM sends back “Invalid Information
Element Contents”
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