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Page 266 / 286 Scroll up to view Page 261 - 265
SPA400 Field Reference
Setup
SPA9000 Voice System Administration Guide
264
C
Setup tab>
Voice
NOTE
The default settings should be sufficient in most use cases. These settings should
be adjusted only after consultation with a service technician for the telephone
company. It is essential that these settings are compatible with those of the Central
Office.
IP Tos/DiffServ
Call Signaling Packets
TOS field in IP header for outgoing SIP packets
Default:
68
RTP Packets
TOS field in IP header for outgoing RTP/RTCP packets
Default:
b8
Session
Enable Session Timer
Enables the SPA400 to encode the Timer header in all
INVITE requests for ringing timeout (checked by default)
Desired Refresh Time
Desired session timer in seconds (0 by default)
Minimum Refresh Time
Minimum value of the session timer in seconds (0 by default)
Voice Codecs
Preferred Codecs
Preferred Codec
The preferred voice codec that SPA400 uses to negotiate
with remote VoIP devices to determine the voice codec for a
call: G.711U, G.711A, or G.729
Voice Codecs
Packetization
The packetization time in milliseconds for each codec:
G.711U, G.711A, G.729
VAD
Voice Activity Detection (OFF or ON)
Default:
OFF
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Page 267 / 286
SPA400 Field Reference
Setup
SPA9000 Voice System Administration Guide
265
C
Voice Setting
Calling Timers
Wait-for-Answer time
The time in seconds that the SPA400 waits for the called
party to answer the call before terminating the call
automatically
The maximum value is 100 seconds.
Default:
180
Call Limit
The maximum time that a call can continue before it is
terminated automatically
Default:
65535
Dialing Parameters
Tone out on
The duration in milliseconds of each tone in a DTMF
sequence
Default:
200
Tone out off
The number of milliseconds that elapses between
successive digits in a DTMF sequence
Default:
200
DTMF power
The power level in 0.1 dBm of the DTMF tones
Default:
-130
Answer after
The number of rings that occur before the SPA400 answers
an incoming call
The maximum value is 2 rings. Because the PSTN does not
transmit caller ID information until after the first ring, this 2-
ring setting is recommended to ensure that caller ID
information is available.
Default:
2
Dial out wait
The number of milliseconds that elapse after the SPA400
seizes a telephony port and before the SPA400 sends DTMF
digits
Default:
400
Dial out battery
threshold
The minimum voltage level that the SPA400 must detect on a
telelphony port before seizing a telephony port for an
outbound call
Default:
20
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Page 268 / 286
SPA400 Field Reference
Setup
SPA9000 Voice System Administration Guide
266
C
Line Settings
Transmit Gain
The gain level that the SPA400 may use to increase or
attenuate the power level before transmitting to the
telephony port
NOTE
Change this setting if remote call participants have
trouble hearing the users of the SPA9000 Voice System. Make
changes in increments of 3 dB; changes of less than 3 dB will
not have a perceptible impact.
Default:
0
Receive Gain
The gain level that the SPA400 may use to increase or
attenuate the power level before receiving on the telephony
port
NOTE
The default Receive Gain settings should be
satisfactory in most use cases. Unnecessary changes in
Receive Gain can cause problems with echo.
Default:
0
Impedance
The impedance of the lines that are connected to SPA400’s
telephony ports
Default:
600 Ohms
Tip/Ring voltage
The tip-to-ring voltage reserved for voice transmission
Default:
3.5 Volts
Operational loop
current Min
The minimum loop current that maintains an off-hook state. If
the loop current drops below this value, the phone enters on
hook state.
Default:
10 mA
On-Hook speed
The time that the loop current drops to 0mA when the phone
enters the on-hook state.
Default:
Less than 0.5ms
Ring frequency Min
The minimum frequency of a valid ring
Default:
10
Ring frequency Max
The maximum frequency of a valid ring
Default:
100
Ring Validation Time
The minimum duration of a valid ring
Default:
256ms
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Page 269 / 286
SPA400 Field Reference
Setup
SPA9000 Voice System Administration Guide
267
C
Ring Indication Delay
The delay in reporting the ring after it presents on the PSTN
line
Default:
512ms
Ring Timeout
The delay on reporting that the ring stopped after it no longer
presents on the PSTN line
Default:
640ms
Ring Threshold
The minimum voltage(rms value) of a valid ring
Default:
13.5-16.5vrms
Ringer Impedance
Default:
High
DC current Limiting
Default:
Enable
Caller Id & CP Tone
Method
The regional settings for Caller ID and call progress tones
Default:
North American
Battery reversal as
discconnect signal
Can be chosen as a method for signalling the end of a call
Default: unselected
Loop period shut-down
as disconnect signal
Can be chosen as a method for signalling the end of a call
Default: selected
Minimum period for
disconnect signal
The minimum duration that the loop current is cut off to signal
the end of the call; used with the loop period shut-down
method
Default:
750
Tear down FXO port
when silence detected
for
The duration of silence that causes the FXO port to
disconnect the call
Default:
300
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SPA400 Field Reference
Setup
SPA9000 Voice System Administration Guide
268
C
Setup tab>
Voicemail Server
Voicemail Settings
Server Port
The UDP port this is open to receive packets
NOTE
This port number must be different from the
signaling port on the SPA9000 line interface. This port
appears in the various mailbox URL fields on the SPA9000
line interface page.
Default:
5090
SPA9000 subscriber ID
The ID that the SPA9000 uses to subscribe to the SPA400
voice mail server to obtain notifications
NOTE
This value appears in the
Proxy and Registration:
Mailbox Subscribe URL
field on the SPA9000 line
interface page.
Example
•
SPA9000 subscriber ID:
8888
•
Mailbox Subscribe URL:
Default:
8888
Mailbox deposit number
The phone number that the SPA9000 uses to deposit voice
mail
NOTE
This value appears in the
Proxy and Registration:
Mailbox Deposit URL
field on the SPA9000 line interface
page.
Example
•
Mailbox deposit number:
900
•
Mailbox Deposit URL:
Default:
900
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