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Page 126 / 186 Scroll up to view Page 121 - 125
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Linksys IP Phone Administrator Guide
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Chapter 5
Linksys ATA Field Reference
Line Tab
Audio Configuration
A codec resource is considered as allocated if it has been included in the SDP codec list of an active call,
even though it eventually may not be the one chosen for the connection. So, if the G.729a codec is
enabled and included in the codec list, that resource is tied up until the end of the call whether or not the
call actually uses G.729a. If the G.729a resource is already allocated and since only one G.729a resource
is allowed per device, no other low-bit-rate codec may be allocated for subsequent calls; the only choices
are G711a and G711u. On the other hand, two G.723.1/G.726 resources are available per device.
Call Back Serv
Enable Call Back Service
Three Way Call Serv
Enable Three Way Calling Service.
Three Way Calling is required for Three Way
Conference and Attended Transfer.
The default is yes.
Three Way Conf Serv
Enable Three Way Conference Service. Three Way Conference is required for Attended
Transfer.
The default is yes.
Attn Transfer Serv
Enable Attended Call Transfer Service. Three Way Conference is required for Attended
Transfer.
The default is yes.
Unattn Transfer Serv
Enable Unattended (Blind) Call Transfer Service.
The default is yes.
MWI Serv
Enable MWI Service.
MWI is available only if a Voice Mail Service is set-up
in the deployment.
The default is yes.
VMWI Serv
Enable VMWI Service (FSK).
The default is yes.
Speed Dial Serv
Enable Speed Dial Service.
The default is yes.
Secure Call Serv
Enable Secure Call Service.
The default is yes.
Referral Serv
Enable Referral Service. See <Referral Services Codes> for more details.
The default is yes.
Feature Dial Serv
Enable Feature Dial Service. See <Feature Dial Services Codes> for more details.
The default is yes.
Service Announcement Serv
Enable Service Announcement Service.
The default is yes.
(Not in PAP2T)
Field
Description
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Therefore it is important to disable the use of G.729a in order to guarantee the support of two
simultaneous G.723/G.726 codec.
Field
Description
Preferred Codec
Preferred codec for all calls. (The actual codec used in a call still depends on the outcome
of the codec negotiation protocol.) Select one of the following: G711u, G711a, G726-16,
G726-24, G726-32, G726-40, G729a, or G723.
The default is G711u.
Silence Supp Enable
To enable silence suppression so that silent audio frames are not transmitted, select yes.
Otherwise, select no.
The default is no.
Use Pref Codec Only
To use only the preferred codec for all calls, select yes. (The call fails if the far end does
not support this codec.) Otherwise, select no.
The default is no.
Silence Threshold
Select the appropriate setting for the threshold: high, medium, or low.
The default is medium.
G729a Enable
To enable the use of the G.729a codec at 8 kbps, select yes. Otherwise, select no.
The default is
yes.
Echo Canc Enable
To enable the use of the echo canceller, select yes. Otherwise, select no.
The
default
is
yes.
G723 Enable
To enable the use of the G.723a codec at 6.3 kbps, select yes. Otherwise, select no.
The
default
is
yes.
Echo Canc Adapt Enable
To enable the echo canceller to adapt, select yes. Otherwise, select no.
The
default
is
yes.
G726-16 Enable
To enable the use of the G.726 codec at 16 kbps, select yes. Otherwise, select no.
The
default
is
yes.
Echo Supp Enable
To enable the use of the echo suppressor, select yes. Otherwise, select no.
The
default
is
yes.
G726-24 Enable
To enable the use of the G.726 codec at 24 kbps, select yes. Otherwise, select no.
The
default
is
yes.
FAX CED Detect Enable
To enable detection of the fax Caller-Entered Digits (CED) tone, select yes. Otherwise,
select no.
The
default
is
yes.
G726-32 Enable
To enable the use of the G.726 codec at 32 kbps, select yes. Otherwise, select no.
The
default
is
yes.
FAX CNG Detect Enable
To enable detection of the fax Calling Tone (CNG), select yes. Otherwise, select no.
The
default
is
yes.
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G726-40 Enable
To enable the use of the G.726 codec at 40 kbps, select yes. Otherwise, select no.
The
default
is
yes.
FAX Passthru Codec
Select the codec for fax passthrough, G711u or G711a.
The default is G711u.
DTMF Process INFO
(Not in PAP2T) To use the DTMF process info feature, select yes. Otherwise, select no.
The
default
is
yes.
FAX Codec Symmetric
To force the Linksys IP phone to use a symmetric codec during fax passthrough, select
yes. Otherwise, select no.
The
default
is
yes.
DTMF Process AVT
(Not in PAP2T) To use the DTMF process AVT feature, select yes. Otherwise, select no.
The
default
is
yes.
FAX Passthru Method
Select the fax passthrough method: None, NSE, or ReINVITE.
The default is NSE.
DTMF Tx Method
Select the method to transmit DTMF signals to the far end: InBand, AVT, INFO, Auto,
InBand+INFO, or AVT+INFO. InBand sends DTMF using the audio path. AVT sends
DTMF as AVT events. INFO uses the SIP INFO method. Auto uses InBand or AVT based
on the outcome of codec negotiation.
The default is Auto.
FAX Process NSE
To use the fax process NSE feature, select yes. Otherwise, select no.
The
default
is
yes.
Hook Flash Tx Method
Select the method for signaling hook flash events:
None
,
AVT
, or
INFO
. None does not
signal hook flash events. AVT uses RFC2833 AVT (event = 16). INFO uses SIP INFO
with the single line signal=hf in the message body. The MIME type for this message body
is taken from the Hook Flash MIME Type setting.
The default is None.
FAX Disable ECAN
If enabled, this feature automatically disables the echo canceller when a fax tone is
detected. To use this feature, select yes. Otherwise, select no.
The default is no.
Release Unused Codec
This feature allows the release of codecs not used after codec negotiation on the first call,
so that other codecs can be used for the second line. To use this feature, select yes.
Otherwise, select no.
The default is yes.
FAX Enable T38
To enable the use of the ITU-T T.38 standard for faxing, select yes. Otherwise, select no.
T.38 is supported by the SPA2102 and the SPA8000. The SPA2102 supports a single T.38
connection. The SPA8000 supports one T.38 connection for each of its four modules (Line
1-2, 3-4, 5-6, and 7-8). The SPA8000 supports a maximum of four connections, but it does
not support two fax devices connected to the same module.
The default is yes.
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Note
References in this section to the SPA3102 also apply to the AG310.
Gateway Accounts (SPA3102/AG310)
FAX T38 Redundancy
Select the appropriate number.
The default is
1
.
Fax Tone Detect Mode
If you want the Gateway to detect the fax tone whether the Gateway is a caller or callee,
then select
caller or callee
. If you want the Gateway to detect the fax tone only if the
Gateway is the caller, then select
caller only
. If you want the Gateway to detect the fax
tone only if the Gateway is the callee, then select
callee only
.
FAX Tone Detect Mode
This parameter has three possible values:
•
caller or callee - SPA will detect FAX tone whether it is callee or caller
•
caller only - SPA will detect FAX tone only if it is the caller
•
callee only - SPA will detect FAX tone only if it is the callee
The default is caller or callee.
Symmetric RTP
(SPA3102 only) Enable symmetric RTP operation. If enabled, the SPA3102 sends RTP
packets to the source address and port of the last received valid inbound RTP packet. If
disabled (or before the first RTP packet arrives) the SPA3102 sends RTP to the destination
as indicated in the inbound SDP.
The default is yes.
Field
Description
Gateway1/2/3/4
The first of 4 gateways that can be specified to be used in the <Dial Plan> to facilitate call
routing specification (that overrides the given proxy information). This gateway is
represented by gw1 in the <Dial Plan>. For example, the rule 1408xxxxxxx<:@gw1> can
be added to the dial plan such that when the user dials 1408+7digits, the call will be routed
to Gateway 1. Without the <:@gw1> syntax, all calls are routed to the given proxy by
default (except IP dialing).
The default is blank.
GW1/2/3/4 NAT Mapping
Enable
If enabled, the SPA will use NAT mapping when contacting Gateway 1.
The default is no.
GW1/2/3/4 Auth ID
This is the authentication user-id to be used by the SPA to authenticate itself to Gateway 1.
The default is blank.
GW1/2/3/4 Password
This is the password to be used by the SPA to authenticate itself to Gateway 1.
The default is blank.
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VoIP Fallback to PSTN (SPA3102/AG310)
Dial Plan
The default dial plan script for each line is as follows:
(*xx|[3469]11|0|00|[2-9]xxxxxx|1xxx[2-9]xxxxxx|xxxxxxxxxxxx.). The syntax for a dial plan
expression is as follows:
If IP dialing is enabled, one can dial [user-id@]a.b.c.d[:port], where ‘@’, ‘.’, and ‘:’ are dialed by
entering *, user-id must be numeric (like a phone number) and a, b, c, d must be between 0 and 255, and
port must be larger than 255. If port is not given, 5060 is used. Port and User-Id are optional. If the
user-id portion matches a pattern in the dial plan, then it is interpreted as a regular phone number
according to the dial plan. The INVITE message, however, is still sent to the outbound proxy if it is
enabled.
Field
Description
Auto PSTN Fallback
If enabled, the SPA will automatically route all calls to the PSTN gateway when the Line
1 proxy is down (registration failure or network link down).
The default is yes.
Table 1-35
Dial Plan Script Syntax
Dial Plan Entry
Functionality
*xx
Allow arbitrary 2 digit star code
[3469]11
Allow x11 sequences
0
Operator
00
Int’l Operator
[2-9]xxxxxx
US local number
1xxx[2-9]xxxxxx
US 1 + 10-digit long distance number
xxxxxxxxxxxx.
Everything else (Int’l long distance, FWD, ...)
Field
Description

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