Relevant Parameters; Mapping Pstn Release Cause To Sip Response; Call Detail Record - 3Com VCX v7111 User Manual

separately quantified and compared to a certain (configurable) threshold. If the
calculated amounts (of delay or packet loss) exceed these thresholds the IP connection
is disallowed.
DNS resolution: When host name is used (instead of IP address) for the destination
route, it is resolved to an IP address by a DNS server. Connectivity and QoS are then
applied to the resolved IP address.

Relevant Parameters

The following parameters (described in
Routing mechanism:
AltRoutingTel2IPEnable
AltRoutingTel2IPMode
IPConnQoSMaxAllowedPL
IPConnQoSMaxAllowedDelay

Mapping PSTN Release Cause to SIP Response

The V7111 FXO gateway is used to interoperate between the SIP network and the
PSTN/PBX. This interoperability includes the mapping of PSTN/PBX Call Progress Tones to
SIP 4xx or 5xx responses for IP Tel calls. The converse is also true: For Tel IP calls, the
SIP 4xx or 5xx responses are mapped to tones played to the PSTN/PBX.
When establishing an IP Tel call the following rules are applied:
If the remote party (PSTN/PBX) is busy and the FXO gateway detects a Busy tone, it sends
486 busy to IP. If it detects a Reorder tone, it sends 404 not found (no route to destination) to
IP. In both cases the call is released. Note that if DisconnectOnBusyTone = 0 the FXO
gateway ignores the detection of Busy/Reorder tones and does not release the call.
For all other V7111 FXS/FXO release types (caused when there are no free channels in the
specific hunt group, or when an appropriate rule for routing the call to a hunt group does not
exist, or if the phone number is not found), the V7111 sends SIP response (to IP) according
to the parameter DefaultReleaseCause. This parameter defines Q.931 release causes. Its
default value is 3, which is mapped to SIP 404 response. By changing its value to 34 SIP
503 response is sent. Other causes can be used as well.

Call Detail Record

The Call Detail Report (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 sent to a Syslog server. The destination
IP address for CDR logs is determined by the parameter CDRSyslogServerIP.
Table 81 lists the CDR fields that are supported.
266
Table 31) are used to configure the Alternative
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3Com VCX V7111 VoIP Gateway User Guide