Configuring R2 Signaling; Introduction To R2 Signaling - HP FlexNetwork MSR Series Configuration Manual

Step
3. Create a TS set according to
the selected signaling mode.
4. Exit E1/T1 interface view.
5. Enter voice view.
6. Enter voice dial program
view.
7. Create a POTS entity and
enter POTS entity view.
8. Bind a logical voice
subscriber line to a POTS
entity.

Configuring R2 signaling

Introduction to R2 signaling

ITU-T recommendations Q.400 through Q.490 define the R2 signaling standards. However, the R2
signaling standards implemented in different countries and regions are ITU variants.
R2 signaling includes two categories: digital line signaling and interregister signaling. Digital line
signaling conveys status information about E1 trunks to describe whether the trunks are occupied,
released, or blocked. Interregister signaling transmits such information as address in multi-frequency
compelled approach. Generally, the calling side serves as the originating PBX and the called side
serves as the terminating PBX. Signals sent by the originating PBX are called forward signals and
those sent by the terminating PBX are called backward signals, as shown in
Figure 18 R2 signaling elements
ITU-T digital line signaling
Digital line signaling is responsible for changing call statuses and conditions of a line. It functions to
identify and detect these four states: calling party goes off-hook and seizes the line, called party goes
off-hook and answers the call, calling party releases the call, and called party releases the call.
Accordingly, it sets the line to be idle or seized. This signaling is transmitted in the 16th multiframe
timeslot of PCM system. The two transmission directions of each line have 4 bits (A, B, C and D) as
flag bits, with C and D bits fixed to 01. Therefore, the forward line signaling adopts a
the backward line signaling adopts a
Command
timeslot-set ts-set-number
timeslot-list timeslots-list signal
{ e&m-delay | e&m-immediate |
e&m-wink | fxo-ground |
fxo-loop | fxs-ground | fxs-loop
| r2 }
quit
voice-setup
dial-program
entity entity-number pots
line slot-number:ts-set-number
and b bits, as shown in the following table:
b b
71
Remarks
N/A
N/A
N/A
N/A
N/A
Optional.
By default, no logical voice
subscriber line is bound to any
POTS entity.
Figure 18.
and b
f
bits and
f