> 4.2.4 | Length Indicator

> The length indicator specifies the length of the following information field. As the maximum frame size N1 is 98 bytes and cannot be changed the E/A bit is always 1. The setting E/A = 0 defined in GSM 07.10 for a frame size greater than 127 bytes is not supported. See also Section 3.1.2 for details on the maximum frame size.
> 1 st octet:

> Bit 1 | Bit 2 | Bit 3 | Bit 4 | Bit 5 | Bit 6 | Bit 7 | Bit 8
> E/A | L1 | L2 | L3 | L4 | L5 | L6 | L7

> 2 nd octet (not supported by Siemens wireless modules):

> Bit 1 | Bit 2 | Bit 3 | Bit 4 | Bit 5 | Bit 6 | Bit 7 | Bit 8
> L8 | L9 | L10 | L11 | L12 | L13 | L14 | L15

> E/A = 1: only one octet for the Length Indicator
> E/A = 0: two octets for the Length Indicator