Cisco Cisco Unified Customer Voice Portal 11.0(1)

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dial-peer voice 1050 voip
destination-pattern 1...
voice-class codec 1
session protocol sipv2
session target <your sip-server destination>
dtmf-relay rtp-nte h245-signal h245-alphanumeric
no vad
When configuring Route Patterns on Unified CM for REFERs to destinations outside of the
cluster, such as to CUPS or the gateways directly, you must add 
SIP Route Pattern
 for the
SIP Trunk associated with that endpoint. For example, if you use REFER to Error DN to the
IP Originated caller on Cisco Unified Communications Manager, and the host of the REFER
To header SIP URL is the CUPS proxy, you must create a SIP Route Pattern with that IP address
or domain name and associate it with your SIP Trunk for CUPS.
Using the sendtooriginator Setting in the SIP Service
Note:
• The information in this section is applicable to all Unified CVP call flow models.
• The setting on the IOS gateway for "signaling forward unconditional" is only required if
ISDN call variables need to be available in the Unified ICME scripting environment. If these
call variables are not required, then omitting this setting is acceptable. The setting makes the
SIP INVITE message larger in terms of bytes due to the extra payload in the message body
for GTD variables. If the packet size is significantly greater than 1300 bytes, then TCP
transport might be recommended over UDP transport due to the possibility of a network
"fragmentation" of messages. Refer to the Operations Console online help for more
information.
For the Unified CVP Branch call flow model, incoming calls into the Unified CVP Call Server
from the gateway might be automatically routed back to the originating gateway at the branch
using the"sendtooriginator" setting in the SIP Service of the Call Server. This setting overrides
sending the call to the outbound proxy or to any locally configured static routes on Unified
CVP. It is also limited in use to calls from the IOS gateway SIP "User Agent," as it will check
the User Agent header value of the incoming invite to verify this information. If the label returned
from Unified ICME for the Unified CVP transfer matches one of the configured patterns under
the Unified CVP "sendtoorginator" settings, then the call will be routed to the SIP URL of
"sip:<label>@<host portion from header of incoming invite>." This functionality is similar to
the Unified CVP H.323 "SetTransferLabel" setting for the H.323 calls.
Expiration Timeout Setting Using Dialed Number Patterns in SIP
The Unified CVP SIP Service can be configured with Dialed Number patterns to set the expiration
timeout of an outbound call for a Unified ICME label. Longer or shorter times can be configured
before the call is cancelled with no pickup (ring no answer timeout). Use the DN Pattern
Outbound Invite Timeout
 option in the Operation Console's SIP Service configuration tab to
add the expiration timeout for a particular dialed number pattern. For example, you can configure
Unified ICME labels to Cisco Unified Communications Manager agents with shorter timeouts
to perform a router requery, if desired.
Configuration and Administration Guide for Cisco Unified Customer Voice Portal Release 4.1(1)
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Chapter 12: - Configuring the SIP Devices
Using the sendtooriginator Setting in the SIP Service