1999 Apr 12
42
Philips Semiconductors
Product specification
FLEX
roaming decoder II
PCD5013
8.7.5
S
HORT MESSAGE
/
TONE
-
ONLY VECTOR PACKET
V:
vector type identifier, these bits set to 010 for a
short message/tone-only vector (Table 42).
WN:
word number of vector (2 to 87 decimal) (Table 42).
WN describes the location of the vector word in the frame.
e:
error (Table 42). Set if more than 2-bit errors are
detected in the word, if the check character calculation fails
after error correction has been performed, or if the vector
value is determined to be invalid.
p:
phase (Table 42). This is the phase on which the vector
was found (0 = A, 1 = B, 2 = C and 3 = D).
t:
message type (Tables 42 and 43). These bits define the
meaning of the d bits in this packet.
x:
unused bits (Table 42). The value of these bits is not
guaranteed.
d:
data bits whose definition depends on the value of t in
this packet according to Table 43. Note that if this vector is
received on a long address and the e bit in this packet is
not set, the decoder sends a message packet from the
word location immediately following the vector packet.
Except for the short message on a non-network address
(t = 0), all messages bits in the message packet are
unused and should be ignored.
Table 42
Short message/tone-only vector packet bit assignments
Table 43
Short message/tone-only vector definitions; note 1
Notes
1.
When this vector is sent in conjunction with a Network Address, the t
1
,t
o
value ‘00’ represents Network ID information.
In this case the bit definitions are: T3 T2 T1 T0 M2 M1 M0 A4 A3 A2 A1 A0
Where T are Traffic Management Flags, M represents a multiplier and A is the service area.
For long addresses, an extra 5 characters are sent in the message packet immediately following the vector packet.
t
0
and t
1
are also set to ‘00’ when defining the last 12 bits of a Network Address.
2.
BYTE
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
3
2
1
0
0
e
x
d
5
WN
6
p
1
x
d
4
WN
5
p
0
d
11
d
3
WN
4
x
d
10
d
2
WN
3
x
d
9
d
1
WN
2
V
2
d
8
d
0
WN
1
V
1
d
7
t
1
WN
0
V
0
d
6
t
0
t
1
0
0
1
t
0
0
1
0
d
11
c
3
s
8
s
1
d
10
c
2
s
7
s
0
d
9
c
1
s
6
R
0
d
8
c
0
s
5
N
5
d
7
b
3
s
4
N
4
d
6
b
2
s
3
N
3
d
5
b
1
s
2
N
2
d
4
b
0
s
1
N
1
d
3
a
3
s
0
N
0
d
2
a
2
S
2
S
2
d
1
a
1
S
1
S
1
d
0
a
0
S
0
S
0
DESCRIPTION
first 3 numeric characters; note 2
8 sources (S) and 9 unused bits (s)
8 sources (S), message retrieval
flag (R), message number (N) and
2 unused bits (s)
spare message type
1
1