Description:
Configures whether preferentially to use the static DNS cache for domain name resolution
of the server for account X.
0-Use domain name resolution from the DNS server preferentially
1-Use static DNS cache preferentially
X ranges from 1 to 16 (for SIP-T54S/T48G/T48S/T46G/T46S/T29G)
X ranges from 1 to 12 (for SIP-T52S/T42G/T42S)
X ranges from 1 to 6 (for SIP-T41P/T41S/T27P/T27G)
X ranges from 1 to 3 (for SIP-T40P/T40G/T23P/T23G)
X ranges from 1 to 2 (for SIP-T21(P) E2)
X is equal to 1 (for SIP-T19(P) E2/CP860/CP920)
Example:
account.1.static_cache_pri = 1
Web User Interface:
None
Phone User Interface:
None
Real-Time Transport Protocol (RTP) Ports
The Real-time Transport Protocol (RTP) is a network protocol for delivering audio over IP
networks. The phone is compatible with RFC 1889 - RTP: A Transport Protocol for Real-Time
Applications - and the updated RFC 3550. It treats all RTP streams as bi-directional from a
control perspective and expects that both RTP end points will negotiate the respective
destination IP addresses and ports.
You can specify the IP phone’s RTP port range. Since the IP phone supports conferencing and
multiple RTP streams, it can use several ports concurrently. The UDP port used for RTP streams
is traditionally an even-numbered port. For example, the default RTP min port on the IP phones
is 11780. The first voice session sends RTP on port 11780. Additional calls would then use ports
11782, 11784, 11786, etc. up to the max port.
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