Using HDLC/LAP-D Protocol

Request Specific Processing

7

CW_TIMERS

Set timers

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

This request is only allowed for non-UI terminals. The

 

 

 

 

 

protocol’s timers may be changed from their configured

 

 

 

 

 

values using this control write. This request should be

 

 

 

 

 

used with caution because the values configured with this

 

 

 

 

request will not be restored if the card is reset by ZCOM.

 

 

 

 

The control request data consists of three pairs of bytes.

 

 

 

 

 

Each pair of bytes consists of a Resolution and a Value.

 

 

 

 

 

The legal values for Resolution are as follows: 0 = don’t

 

 

 

 

set, 1 = 10msec, 2 = 100msec, 3 = 1sec, 4 = 10sec.

 

 

 

 

 

 

 

Note that these values are different from the values used

 

 

 

 

for the resolutions when configuring a terminal. The

 

 

 

 

 

Values are used directly. A zero Value will disable the

 

 

 

 

 

timer if the resolution is non-zero.

 

 

 

 

 

 

 

 

 

 

 

The first pair of bytes applies to T200, the second pair is

 

 

 

 

ignored (should be set to zero) and the third pair apply to

 

 

 

 

T203:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

14

13

12

11

 

10

9

8

7

6

5

4

3

2

 

1

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T200 Resolution (0-4)

 

 

 

T200 Value (0-255)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T203 Resolution (0-4)

 

 

 

T203 Value (0-255)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Received Data

When I-frames or UI-frames are received, the information field is sent to the associated ZLU.

Chapter 3

31