System information

Configuring Voice
Configuring Voice Settings
Cisco SPA100 Series Phone Adapters Administration Guide 64
4
DTMF Relay MIME Type MIME Type used in a SIP INFO message to signal a
DTMF event. Default setting: application/dtmf-
relay.
Hook Flash MIME Type MIME Type used in a SIP INFO message to signal a
hook flash event. Default setting: application/hook-
flash
Remove Last Reg Lets you remove the last registration before
registering a new one if the value is different.
Select yes or no from the drop-down list. Default
setting: no.
Use Compact Header Lets you use compact SIP headers in outbound
SIP messages. Select yes or no from the drop-
down list. If set to yes, the ATA uses compact SIP
headers in outbound SIP messages. If set to no,
the ATA uses normal SIP headers. If inbound SIP
requests contain compact headers, the ATA
reuses the same compact headers when
generating the response regardless the settings
of the Use Compact Header parameter. If inbound
SIP requests contain normal headers, the ATA
substitutes those headers with compact headers
(if defined by RFC 261) if Use Compact Header
parameter is set to yes. Default setting: no.
Escape Display Name Lets you keep the Display Name private. Select
yes if you want the ATA to enclose the string
(configured in the Display Name) in a pair of
double quotes for outbound SIP messages.
If the
display name includes " or \, these will be escaped
to \" and \\ within the double quotes. Otherwise,
select no. Default setting: no.
RFC 2543 Call Hold Configures the type of call hold: a:sendonly or
0.0.0.0. Default setting: no; do not use the 0.0.0.0
syntax in a HOLD SDP; use the a:sendonly syntax.
If set to yes, all AVT tone packets (encoded for
redundancy) have the marker bit set. If set to no,
only the first packet has the marker bit set for each
DTMF event. Default setting: Yes
Field Description