Rec. No.
INTRODUCTION – Principles
of Signalling System R1
SECTION 1 – Definition and
function of signals
Q.310 1. Definition and
function of signals
SECTION 2 – Line
signalling
Q.311 2.1 2600 Hz line
signalling
Q.312 2.2 2600 Hz line signal
sender (transmitter)
Q.313 2.3 2600 Hz line signal
receiving equipment
Q.314 2.4 PCM line signalling
Q.315
2.5 PCM line signal
sender (transmitter)
Q.316 2.6 PCM line signal
receiver
Q.317 2.7 Further specification
clauses relative to line signalling
Q.318 2.8 Double seizing with
both-way operation
Q.319 2.9 Speed of switching in
international exchanges
SECTION 3 – Register signalling
Q.320 3.1 Signal code for
register signalling
Q.321 3.2 End-of-pulsing
conditions – Register arrangements concerning ST signal
Q.322
3.3 Multifrequency signal
sender
Q.323 3.4 Multifrequency signal
receiving equipment
Q.324 3.5 Analysis of address
information for routing
Q.325 3.6 Release of registers
Q.326
3.7 Switching to the
speech position
SECTION 4 – Testing arrangements
Q.327 4.1 General arrangements
Q.328
4.2 Routine testing of
equipment (local maintenance)
Q.329 4.3 Manual testing
Q.330
4.4 Automatic
transmission and signalling testing
Q.331 4.5 Test equipment for
checking equipment and signals
Annex A to the specifications of
signalling system R1