Cisco SPA1112 Provisioning Manual page 116

Voice Parameters
<RTP_ToS/DiffServ_Value_1> through
<RTP_ToS/DiffServ_Value_5_>
<RTP_CoS_Value_1_> through <RTP_
CoS_Value_5_>
<Network_Jitter_Level_1_> through
<Network_Jitter_Level_5_>
<Jitter_Buffer_Adjustment_1_> through
<Jitter_Buffer_Adjustment_5_>
<SIP_Transport_1_> through <SIP_
Transport_5_>
<SIP_Port_1_> through <SIP_Port_5_>
<SIP_100REL_Enable_1_> through
<SIP_100REL_Enable_5_>
<EXT_SIP_Port_1_> through <EXT_SIP_
Port_5_>
Provisioning Guide for Cisco SPA100 and SPA200 Series Analog Telephone Adapters
ToS/DiffServ field value in UDP IP packets carrying RTP data.
Default setting: 0xb8
CoS value for RTP data. Valid values are 0 through 7.
Default setting: 6
Determines how jitter buffer size is adjusted by the ATA. Jitter
buffer size is adjusted dynamically. The minimum jitter buffer
size is 30 milliseconds or (10 milliseconds + current RTP
frame size), whichever is larger, for all jitter level settings.
However, the starting jitter buffer size value is larger for higher
jitter levels. This setting controls the rate at which the jitter
buffer size is adjusted to reach the minimum. Select the
appropriate setting: low, medium, high, very high, or extremely
high.
Default setting: high
Choose yes to enable or no to disable this feature.
Default setting: yes
The TCP choice provides "guaranteed delivery", which
assures that lost packets are retransmitted. TCP also
guarantees that the SIP packages are received in the same
order that they were sent. As a result, TCP overcomes the
main disadvantages of UDP. In addition, for security reasons,
most corporate firewalls block UDP ports. With TCP, new
ports do not need to be opened or packets dropped, because
TCP is already in use for basic activities such as Internet
browsing or e-commerce. Options are: UDP, TCP, TLS.
Default setting: UDP
Port number of the SIP message listening and transmission
port.
Default setting: 5060
To enable the support of 100REL SIP extension for reliable
transmission of provisional responses (18x) and use of PRACK
requests, select yes. Otherwise, select no.
Default setting: no
The external SIP port number.
Default setting: blank
6
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