Wavecom W74PC Manual page 281

Parameter hex Value ZVEI (first data word)
0 User defined
1 Call to mobile
2 Call to base station
3 Identification
4 Acknowledgement
5 Spare (indicate VDEW)
6 Separation call
7 Spare
8 Priority call
9 Status request
A Spare
B Acknowledgement
C Spare
D User defined
E User defined
F Emergency call
Status for ZVEI and VDEW (STAT:)
Four bits are available. In the VDEW system these four bits indicate the number of follow-up telegrams.
The last follow-up telegram and a basic telegram without follow-up telegrams are indicated by 0xA. In
ZVEI the status bits can be used by the carrier.
Rhombic labeling (RAUTE:)
Four bits are used as additional distinction for a producer designation. The use is not determined.
Manufacturer identification (Herst:)
Two digits are used. The classification is determined by ZVEI.
In the newer VDEW system the rhombic labeling and the manufacturer identification are combined into
one field of three digits, called EVU number (EVU#:).
Call number ZVEI and VDEW (Ruf#:)
Three digits are used. The hundred-position digit is transmitted first, the one-position digit last. Group
calls are transmitted as pseudo-tetrads of '1111' (16). For a group call in the 10s range the digit repre-
senting 1s is filled with logical '1'. For a group call in the 100s range, the 1s and 10s digit are filled with
logical '1', and for a 1000s range call all 12 bits are filled with logical '1'.
EVU and call number are transferred in a block of six digits. The partitioning is either 3 digits for either
items or 2 EVU digits plus 4 call number digits. The chosen variant cannot be derived from the data, so
both versions are displayed.
The following picture shows a trace of a VDEW transmission with basic telegram and a single follow-up
telegram, displaying both versions of partitioning, i.e., 3 + 3 as well as 2 + 4.
WAVECOM Decoder W74PC, W-PCI/e, W-CODE, W-CLOUD Manual V9.1.0
Value VDEW (following data words)
Not used
Call to mobile
Direct Access
Identification
Acknowledgement
Sequence telegram
Separation call
Recall
Emergency call
Status request/response
Position request
Acknowledgement
Quick dialing
Data
Spare
Not used
Transmission Modes  271