carries no RR. The SDES contains CNAME, NAME, and TOOL identifiers. The CNAME is set to
<User ID>@<Proxy>, NAME is set to <Display Name> (or “Anonymous” if user blocks caller ID),
and TOOL is set to the Verdor/Hardware-platform-software-version (such as Linksys/PHONE
ADAPTER2000-1.0.31(b)). The NTP timestamp used in the SR is a snapshot of the PHONE
ADAPTER’s local time, not the time reported by an NTP server. If the PHONE ADAPTER
receives a RR from the peer, it will attempt to compute the round trip delay and show it as the
<Call Round Trip Delay> value (ms) in the Info section of PHONE ADAPTER web page.
Parameter Name Description Type Default
Line Enable Enable this line for service Bool Yes
MOH Server2The User ID or URL of the auto-answering SAS to
contact for MOH services. Examples: 5000,
1001@music.Linksys.com, 66.12.123.15:5061.
Note: When only a user-id is given, the current
proxy or outbound proxy will be contacted as in the
making of a regular outbound call. MOH is disabled
if this parameter is not specified (empty).
Str127 Empty
SIP Port SIP message listening port and transmission port Port 5060
SIP TOS/DiffServ
Value TOS/DiffServ field value in UDP IP Packets
carrying a SIP Message Byte 0x68
RTP TOS/DiffServ
Value TOS/DiffServ field value in UDP IP Packets
carrying a RTP data Byte 0xb8
SAS Enable3Enables the FXS Line to act as a Streaming Audio
Source (SAS). If enabled, the line cannot be used
for making outgoing calls. Instead, it auto-answers
incoming calls and streams audio RTP packets to
the calling party.
Bool No
SAS DLG Refresh
Intvl3If non-zero, this is the interval at which SAS sends
out session refresh (SIP re-INVITE) messages to
detect if connection to the caller is still up. If the
caller does not respond to refresh message,
PHONE ADAPTER will terminate this call with a
SIP BYE message. The default = 0 (Session
refresh disabled)
Range = 0-255 (s)
0
SAS Inbound RTP
Sink3The purpose of this parameter is to work around
devices that do not play inbound RTP if the SAS
line declares itself as a “sendonly” device and tells
the client not to stream out audio. This parameter is
a FQDN or IP address of a RTP sink to be used by
the PHONE ADAPTER SAS line in the SDP of its
200 response to inbound INVITE from a client. It
will appear in the c = line and the port number and,
if specified, in the m = line of the SDP. If this value
is not specified or equal to 0, then c = 0.0.0.0 and
a=sendonly will be used in the SDP to tell the SAS
client to not to send any RTP to this SAS line. If a
non-zero value is specified, then a=sendrecv and
the SAS client will stream audio to the given
address. Special case: If the value is $IP, then the
Str63
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