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Note

For SIP to TDM calls, the first Progress/183 or Alert/180 response sent on the SIP side always contains an SDP; as a result, any inband audio is cut through or ringback is generated. Even if the Message Translation Table is configured to not include SDP, this process overrides the configuration.

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Before you start - click here to view the ISDN Progress Indicator (PI) assignmentsBefore you start - click here to view the ISDN Progress Indicator (PI) assignments
Table plus
style="text-align:center;vertical-align:middle;",style="text-align:left;vertical-align:middle;"BLOCK

PI

Definition

0

No Progress Indicator included

1

Not end-to-end ISDN

2

Destination address is not ISDN

3

Origination address is not ISDN

4

Call has returned to ISDN

5

Internetworking Encountered

8

Inband information available

10

Delay Encountered

 

Internal Translations ISDN to SIP

...

Click here to viewClick here to viewClick here to viewexpandClick here to viewClick here to view

#

Incoming ISDN side

Outgoing SIP side

How the

Spacevars
0product
Internally Processes the Translation

1

Alert without PI

180 Ringing without SDP

Expand
Click here to view

Panel
borderColorwhite
bgColor#FAFAFA

Incoming Filter

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Any

Alert

PI

Not Present

Outgoing Translation

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

OUT Message

Send Message

OUT IE

Media Cut Through

Alert

Yes

Not Present

Yes

2

Alert with PI 1, 8, 2

180 Ringing; if early media negotiated, don't include SDP

Expand
Click here to view

Panel
borderColorwhite
bgColor#FAFAFA

Incoming Filter

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Early media negotiated

Alert

PI

1 | 8 | 2

Outgoing Translation

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

OUT Message

Send Message

OUT IE

Media Cut Through

Alert

Yes

Not Present

Yes

3

Alert with PI 1, 8, 2

180 Ringing; if early media not negotiated, include SDP

Expand

Click here to view
Panel
borderColorwhite
bgColor#FAFAFA

Incoming Filter

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Early media not negotiated

Alert

PI

1 | 8 | 2

Outgoing Translation

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

OUT Message

Send Message

OUT IE

Media Cut Through

Alert

Yes

Present

Yes

4

Progress with PI 1, 8, 2

183 Progress; if early media negotiated, don't include SDP

Expand
Click here to viewClick here to view
Panel
borderColorwhite
bgColor#FAFAFA

Incoming Filter

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Early media negotiated

Progress

PI

1 | 8 | 2

Outgoing Translation

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

OUT Message

Send Message

OUT IE

Media Cut Through

Progress

Yes

Not Present

Yes

5

Progress with PI 1, 8, 2

183 Progress; if early media not negotiated, include SDP

Click here to viewClick here to view
Panel
borderColorwhite
bgColor#FAFAFA

Incoming Filter

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Early media not negotiated

Progress

PI

1 | 8 | 2

Outgoing Translation

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

OUT Message

Send Message

OUT IE

Media Cut Through

Progress

Yes

Present

Yes

6

Progress with PI 3, 4

183 Progress without SDP

Expand

Click here to view
Panel
borderColorwhite
bgColor#FAFAFA

Incoming Filter

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Any

Progress

PI

3 | 4

Outgoing Translation

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

OUT Message

Send Message

OUT IE

Media Cut Through

Progress

Yes

Not Present

Yes

7

Progress without PI

Drop message

Expand
Click here to view

Drop message

Panel
borderColorwhite
bgColor#FAFAFA

Incoming Filter

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Any

Progress

PI

Not Present

Outgoing Translation

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

OUT Message

Send Message

OUT IE

Media Cut Through

Progress

No

N/A

N/A

Note

Please note that ISDN → SIP message translations are only used on SIP → ISDN calls.

...

Click here to viewClick here to viewClick here to view

#

Incoming SIP side

Outgoing ISDN side

How the 

Spacevars
0product
Internally Processes the Translation

1

180 Ringing without SDP

Alerting without PI

Expand
Click here to viewClick here to view
Panel
borderColorwhite
bgColor#FAFAFA

Incoming Filter

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Any

Alert

PI

Not Present

Outgoing Translation

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

OUT Message

Send Message

OUT IE

Media Cut Through

Alert

No on cut through

Not Present

Yes On Early Media Detection

2

180 Ringing with SDP

Alerting with PI = 8

Expand

Click here to view
Panel
borderColorwhite
bgColor#FAFAFA

Incoming Filter

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Any

Alert

PI

Present

Outgoing Translation

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

OUT Message

Send Message

OUT IE

Media Cut Through

Alert

No on cut through

PI=8

Yes On Early Media Detection

3

183 Progress without SDP

Progress with PI = 1

Expand
Click here to view

Panel
borderColorwhite
bgColor#FAFAFA

Incoming Filter

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Any

Progress

PI

Not Present

Outgoing Translation

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

OUT Message

Send Message

OUT IE

Media Cut Through

Progress

No on subsequent

PI=1

Yes On Early Media Detection

4

183 Progress SDP

Progress with PI = 8

Expand

Click here to view
Panel
borderColorwhite
bgColor#FAFAFA

Incoming Filter

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Any

Progress

PI

Present

Outgoing Translation

Table plus
cellpadding0
cellspacing0
width450px
columnAttributesstyle="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;",style="text-align:center;vertical-align:middle;"
class''

OUT Message

Send Message

OUT IE

Media Cut Through

Progress

No on subsequent

PI=8

Yes On Early Media Detection

Note

Please note that SIP → ISDN message translations are only used on ISDN → SIP calls.

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