Information element | Direction | Type | Length | Note |
---|---|---|---|---|
Protocol discriminator | Both | M | 1 | |
Call reference | Both | M | 2-* | |
Message type | Both | M | 1 |
Display 4.5 n ® u O (Note 1) (Note 2) Signal 4.5 n ® u O (Note 3) 2-3 NOTES 1 Included if the network provides information that can be presented to the user. 2 The minimum length is 2 octets; the maximum length is network dependent and is either 34 or 82 octets. 3 Included if the network optionally provides additional information describing tones.