Message type: CONNECT
Significance: global
Direction: both

Information element

Reference (subclause)

Direction

Type

Length

Protocol discriminator

4.2

Both

M

1

Call reference

4.3

Both

M

2-*

Message type

4.4

Both

M

1

Bearer capability

4.5

Both

O (Note 1)

4-12

Channel identification

4.5

Both (Note 2)

O (Note 3)

2-*

Progress indicator

4.4

Both

O (Note 4)

2-4

Display

4.5

n ® u

O (Note 5)

(Note 6)

Date/time

4.5

n ® u

O (Note 7)

8

Signal

4.5

n ® u

O (Note 8)

2-3

Low layer compatibility

4.5

Both

O (Note 9)

2-18

High layer compatibility

4.5

Both

O (Note 10)

2-5

NOTES

1. The Bearer capability information element is included when the procedures of 5.11 for bearer capability selection apply.

2. Included in the network-to-user direction for support of the procedures in Annex D.

3. Mandatory if this is the first message in response to a SETUP, unless the user accepts the B-channel indicated in the SETUP message.

4. Included in the event of interworking or in connection with the provision of in-band information/patterns.

5. Included if the network provides information that can be presented to the user.

6. The minimum length is 2 octets; the maximum length is network dependent and is either 34 or 82 octets.

7. As a network option, may be included to provide date and time information to the calling user for all calls or for calls involving specific telecommunication services.

8. Included if the network optionally provides additional information describing tones.

9. Included in the user-to-network when the answering user wants to return low layer compatibility information to the calling user. Included in the network-to-user direction if the user awarded the call included a Low layer compatibility information element in the CONNECT message. Optionally included for low layer compatibility negotiation, but some networks may not transport this information element to the calling user (see Annex J).

10. The High layer compatibility information element is included when the procedures of 5.12 for high layer compatibility selection apply.