\fINote\fR \ \(em\ Implementation of primitives in equipment is not for
recommendation.
.sp 1P
.LP
6.2.2
\fISignals\fR
.sp 9p
.RT
.PP
The identifications of specific signals across the GDCI are given in Table\
2/V.230. Also included is the coding for these signals.
.bp
.RT
.ce
\fBH.T. [T2.230]\fR
.ce
TABLE\ 2/V.230
.ce
\fBDefinition of INFO signals \fR
.ce
(Note 1)
.ps 9
.vs 11
.nr VS 11
.nr PS 9
.TS
center box;
cw(114p) | cw(114p) .
Signals from MASTER TO SLAVE Signals from SLAVE TO MASTER
_
.T&
lw(30p) | lw(84p) | lw(30p) | lw(84p) .
INFO 0 No signal INFO 0 No signal
.T&
lw(30p) | lw(84p) | lw(30p) | lw(84p) .
INFO 1 (Note 2) T{
A continuous signal with the following pattern:
Positive ZERO, negative ZERO, six ONEs
\fBMONTAGE Figure CCITT 62731\fR
Nominal bit rate\ = 192\ kbit/s \fR
T}
.T&
lw(30p) | lw(84p) | lw(30p) | lw(84p) .
INFO 2 (Note\ 3) T{
Frame with all bits of BV, DV and DV\(hyecho channels set
to binary ZERO.
Bit A set to binary ZERO.
N and L bits set according to the normal coding rules.
T}
.T&
lw(30p) | lw(84p) | lw(30p) | lw(84p) .
INFO 3 T{
Synchronized frames with operational data on BV and DV channels.
T}
.T&
lw(30p) | lw(84p) | lw(30p) | lw(84p) .
INFO 4 (Note\ 3) T{
Frames with operational data on BV, DV and DV\(hyecho channels. Bit A set
to binary ONE.
T}
.TE
.LP
\fINote\ 1\fR
\ \(em\ For configurations where the wiring polarity may be reversed
(see\ \(sc\ 4.3) signals may be received with the polarity of the binary ZEROs
inverted. All receivers should be designed to tolerate wiring
polarity reversals.
.LP
\fINote\ 2\fR
\ \(em\ Slave mode equipment which does not need the capability to initiate activation of a deactivated V.230 interface need not have the capability to
send INFO\ 1. In all other respects, this equipment shall be in accordance with \(sc\ 6.2. It should be noted that in the point\(hyto\(hymultipoint configuration more
that one slave mode equipment transmitting simultaneously will produce a bit
pattern, as received by the master mode equipment, different from that
described above, e.g., two or more overlapping (asynchronous) intances of
INFO\ 1.
.LP
\fINote\ 3\fR
\ \(em\ During the transmission of INFO\ 2 or INFO\ 4, the F bits and the
M/bits from the master mode equipment provide the Q\(hybit pattern designation as described in \(sc\ 6.3.3.
.nr PS 9
.RT
.ad r
\fBTable\ 2/V.230 [T2.230], p.\fR
.sp 1P
.RT
.ad b
.RT
.sp 2P
.LP
6.2.3
\fIActivation/deactivation procedure for slave mode equipment\fR
.sp 1P
.RT
.sp 1P
.LP
6.2.3.1
\fIGeneral procedures\fR
.sp 9p
.RT
.PP
All slave mode equipment conforms to the following procedures
(these statements are an aid to understanding; the complete procedures are
specified in \(sc\ 6.2.3.2):
.RT
.LP
a)
Equipment, when first connected, when power is applied,
or upon the loss of frame alignment (see \(sc\ 6.3.1.1) shall
transmit INFO\ 0. However, an equipment that is disconnected
but powered could be transmitting INFO\ 1 when connected.
.LP
b)
Equipment transmits INFO\ 3 when frame alignment is
established (see \(sc\ 6.3.1.2). However, the satisfactory
transmission of operational data cannot be assured prior to
the receipt of INFO\ 4.
.LP
c)
Equipment shall, when power is removed, initiate the
transmission of INFO\ 0 before frame alignment is lost.
.sp 1P
.LP
6.2.3.2
\fISpecification of the procedure\fR
.sp 9p
.RT
.PP
The procedure for equipment to follow during
activitation/deactivation is shown in the form of a finite state matrix
Table\ 3/V.230. The use of the primitives at the layer\ 1/2 boundary and
at the layer\ 1/management entity boundary are also included. Those primitives
serve
to identify the connection status, and to identify whether other equipment
connected to the passive bus is operating according to V.230 or I.430.
.bp
.RT
.ce
\fBH.T. [1T3.230]\fR
.ps 9
.vs 11
.nr VS 11
.nr PS 9
.TS
center box;
cw(330p) .
TABLE\ 3/V.230
.T&
cw(330p) .
T{
\fBActivation/deactivation layer\ 1 finite state matrix for
