Cisco SPA IP Phone Field Reference
SIP Tab
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 257
A
 
RFC 2543 Call Hold  If set to yes, unit will include c=0.0.0.0 syntax in 
SDP when sending a SIP re-INVITE to the peer to 
hold the call. If set to no, unit will not include the 
c=0.0.0.0 syntax in the SDP. The unit will always 
include a=sendonly syntax in the SDP in either 
case. 
Defaults to yes.
Random REG CID On 
Reboot
If set to yes, the Cisco IP phone uses a different 
random call-ID for registration after the next 
software reboot. If set to no, the Cisco IP phone 
tries to use the same call-ID for registration after 
the next software reboot. The Cisco IP phone 
always uses a new random Call-ID for registration 
after a power-cycle, regardless of this setting.
Defaults to no.
Mark All AVT packets If set to yes, all audio video transport (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.
Defaults to yes.
SIP TCP Port Min Specifies the lowest TCP port number that can be 
used for SIP sessions. Defaults to 5060. 
SIP TCP Port Max Specifies the highest TCP port number that can 
be used for SIP sessions. Defaults to 5080.
CTI Enable The CTI interface allows a third-party application 
to control and monitor the state of a phone that 
has registered with the Cisco SPA9000. With this 
interface, an application can control a phone to 
initiate an outgoing call or answer an incoming call 
with a mouse click from a PC.
Caller ID Header Provides the option to take the caller ID from 
PAID-RPID-FROM, P-ASSERTEDIDENTITY, 
REMOTE-PARTY-ID, or FROM header.
Parameter Description