SIP User's Manual 352 Document #: LTRT-68806
Mediant 2000 & TP-1610 & TP-260/UNI
7.6.3 PSTN Fallback as a Special Case of Alternative Routing
The PSTN Fallback feature enables the gateway to redirect PSTN originated calls back to
the legacy PSTN network if a destination IP route is unsuitable (disallowed) for voice traffic
at a specific time.
To enable PSTN fallback, assign the IP address of the gateway as an alternative route to
the desired prefixes. Note that calls (now referred to as IP-to-Tel calls) can be re-routed to
a specific trunk group using the Routing parameters (refer to 'IP to Trunk Group Routing'
on page 126).
7.6.4 Relevant Parameters
The following parameters (described in 'General Parameters' on page 120) are used to
configure the Alternative Routing mechanism:
îš„ AltRoutingTel2IPEnable
îš„ AltRoutingTel2IPMode
îš„ IPConnQoSMaxAllowedPL
îš„ IPConnQoSMaxAllowedDelay
7.7 Call Detail Record
The Call Detail Record (CDR) contains vital statistic information on calls made by the
gateway. CDRs are generated at the end and (optionally) at the beginning of each call
(determined by the parameter CDRReportLevel), and then sent to a Syslog server. The
destination IP address for CDR logs is determined by the parameter CDRSyslogServerIP.
For CDR in RADIUS format, refer to 'Supported RADIUS Attributes' on page 354.
The following table lists the CDR fields that are supported.
Table 7-2: Supported CDR Fields
Field Name Description
Cid Port Number
CallId SIP Call Identifier
Trunk Physical Trunk Number (digital only)
BChan Selected B-Channel (digital only)
ConId SIP Conference ID
TG Trunk Group Number
EPTyp Endpoint Type
Orig Call Originator (IP, Tel)
SourceIp Source IP Address
DestIp Destination IP Address
TON Source Phone Number Type
NPI Source Phone Number Plan
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