SIP User's Manual 742 Document #: LTRT-83310
Mediant 600 & Mediant 1000
Parameter Description
Web: Add CIC
[AddCicAsPrefix]
Determines whether to add the Carrier Identification Code (CIC) as
a prefix to the destination phone number for IP-to-Tel calls.
[0] No (default)
[1] Yes
When this parameter is enabled, the cic parameter in the incoming
SIP INVITE can be used for IP-to-Tel routing decisions. It routes
the call to the appropriate Trunk Group based on this parameter's
value.
The SIP cic parameter enables the transmission of the cic
parameter from the SIP network to the ISDN. The cic parameter is
a three- or four-digit code used in routing tables to identify the
network that serves the remote user when a call is routed over
many different networks. The cic parameter is carried in the SIP
INVITE and maps to the ISDN Transit Network Selection
Information Element (TNS IE) in the
outgoing ISDN Setup message
(if the EnableCIC parameter is set to 1). The TNS IE identifies the
requested transportation networks and allows different providers
equal access support, based on customer choice.
For example, as a result of receiving the below INVITE, the
destination number after number manipulation is
cic+167895550001:
INVITE
sip:5550001;cic=+16789@172.18.202.60:5060;user=phone
SIP/2.0
Note: After the cic prefix is added, the Inbound IP Routing Table
can be used to route this call to a specific Trunk Group. The
Destination Number IP to Tel Manipulation table must be used to
remove this prefix before placing the call to the ISDN.
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