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Parameter
Description
Valid Options
RTP Codec Second
Order
The Realtime Transport Protocol (RTP) code to use.
a-law
algorithm is commonly used in Europe.
u-law
(mu-law or µ-law) algorithm is commonly used
in the USA and Japan.
g723
(T-series only) G723 encoding
g729
(T-series only) G729 encoding
none
all settings for this order are copied from the
First Order values.
none ‡, u-law, a-law, g723, g729
Packet Rate Second
Order
(xDSL or T-series only) The expected second-order RTP
packet rate sent by the ONT or E-series (packets/msec).
10ms ‡, 20ms, 30 ms
Silence Suppression
Second Order
Whether to enable Silence Suppression second-order
priority codec.
selected, unselected ‡
RTP Codec Third
Order
The Realtime Transport Protocol (RTP) code to use.
a-law
algorithm is commonly used in Europe.
u-law
(mu-law or µ-law) algorithm is commonly used
in the USA and Japan.
g723
(T-series only) G723 encoding
g729
(T-series only) G729 encoding
none
all settings for this order are copied from the
First Order values.
none ‡, u-law, a-law, g723, g729
Packet Rate Third
Order
(xDSL or T-series only) The expected third-order RTP
packet rate sent by the ONT or E-series (packets/msec).
10ms ‡, 20ms, 30ms
Silence Suppression
Third Order
Whether to enable Silence Suppression third-order priority
codec.
selected (enabled), unselected (disabled)
‡
T1 Timer (ms)
T1 and T2 are SIP timers. T1 is an estimate of the round
trip time, the client will start to retransmit an INVITE
transaction at T1 and then double the time for each
subsequent retransmission.
100-1500
500 ‡
T2 Timer (s)
T1 and T2 are SIP timers. T2 is the maximum retransmit
interval for non-INVITE requests and INVITE responses.
These will rarely change.
1-5
4 ‡
Registration
Period(s)
Duration of the SIP registration request.
60-86400
3600 ‡
Distinctive Ring
Prefix
Distinctive ring prefix is an identifier used in the Alert-Info
header field (up to 36 characters). The E-Series acts as
the media gateway to support different ring cadences
generated from the softswitch in real time. Assigning
distinctive ring patterns to specific incoming numbers for a
specific VoIP port must be configured on the softswitch.
Important: The case-sensitive name must match the
Distinctive Ringing text string used by the softswitch.
The softswitch sends an INVITE to the E-Series with the
header Alter-Info field, for example:
AlertInfo = <xxx://xxx.xx.xx/xxx/Bellcore-dr1>
The string after last forward slash ( / ) is parsed as the
ring ID.
When a line is in ring state, the ring cadence is used
based on the Alert-Info header in INVITE message. The
cycle that is defined by the ring cadence index is repeated
until the line leaves the ring state.
text string
Bellcore-dr ‡
Call Waiting Prefix
Call-waiting ring prefix.
text string
CallWaitingTone ‡
