Coded Ringing - Nortel DMS-100 Series General Description Manual

Figure 1-13 LCE superimposed revertive ringing with immediate ring enable
1FR
(Ring pty)
Note 1: CC Patch TLA67 does not allow the use of NT6X17 line cards for 2-party
lines in the office.
Note 2: ANI/coin will use any available slots.

Coded ringing

Coded ringing is used on multiparty lines to distinguish individual parties from
other parties on the tip or ring side of the line. In a multiparty configuration,
one to ten subscribers can be connected to one line; that is, five on the tip side
and five on the ring side. A special ringing code is available for each party on
the tip and ring sides of the line, which is five codes per side. When a
subscriber on a multiparty line rings, the ringing code for the called subscriber
is applied to the tip or ring side of the line, depending on which side of the line
the called subscriber is connected. All subscribers on the same side of the line
as the called subscriber receive the ringing code for the called party. The called
party, upon identifying his or her ringing code, answers the call. The following
figure illustrates ringing on a coded ringing, multiparty line.
0.5 s
0 1 2 3
0 1 2 3 4
DMS-100 Family DMS-100 Ringing System BASE15 and up
DMS-100 ringing overview 1-15
6 s
4 5 6 7 8
5 6 7 8
9 10 11
9 10 11