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In addition to the Message Translation Usage Overview, the following article contains a listing of the pre-programmed Message Translations on the Sonus SBC 1000/2000.

 Before you start - click here to view the ISDN Progress Indicator (PI) assignments

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

Listed are the default (internal) message translations for ISDN → SIP:

#

Incoming ISDN side

Outgoing SIP side

How the Sonus SBC 1000/2000 Internally Processes the Translation

1

Alert without PI

180 Ringing without SDP

 Click here to view

Incoming Filter

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Any

Alert

PI

Not Present

Outgoing Translation

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

 Click here to view

Incoming Filter

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Early media negotiated

Alert

PI

1 | 8 | 2

Outgoing Translation

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

 Click here to view

Incoming Filter

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Early media not negotiated

Alert

PI

1 | 8 | 2

Outgoing Translation

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

 Click here to view

Incoming Filter

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Early media negotiated

Progress

PI

1 | 8 | 2

Outgoing Translation

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 view

Incoming Filter

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Early media not negotiated

Progress

PI

1 | 8 | 2

Outgoing Translation

OUT Message

Send Message

OUT IE

Media Cut Through

Progress

Yes

Present

Yes

6

Progress with PI 3, 4

183 Progress without SDP

 Click here to view

Incoming Filter

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Any

Progress

PI

3 | 4

Outgoing Translation

OUT Message

Send Message

OUT IE

Media Cut Through

Progress

Yes

Not Present

Yes

7

Progress without PI

Drop message

 Click here to view

Incoming Filter

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Any

Progress

PI

Not Present

Outgoing Translation

OUT Message

Send Message

OUT IE

Media Cut Through

Progress

No

N/A

N/A

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

Internal Translations SIP to ISDN

Listed are the default (internal) message translations for SIP → ISDN:

#

Incoming SIP side

Outgoing ISDN side

How the Sonus SBC 1000/2000 Internally Processes the Translation

1

180 Ringing without SDP

Alerting without PI

 Click here to view

Incoming Filter

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Any

Alert

PI

Not Present

Outgoing Translation

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

 Click here to view

Incoming Filter

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Any

Alert

PI

Present

Outgoing Translation

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

 Click here to view

Incoming Filter

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Any

Progress

PI

Not Present

Outgoing Translation

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

 Click here to view

Incoming Filter

Early Media Status

IN Message

IN IE Type

IN Progress Indicator

Any

Progress

PI

Present

Outgoing Translation

OUT Message

Send Message

OUT IE

Media Cut Through

Progress

No on subsequent

PI=8

Yes On Early Media Detection

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