Nortel DMS-100 Series General Description Manual page 41
Ringing system
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Also See for DMS-100 Series:
- Replacement procedures (1100 pages) ,
- Maintenance manual (762 pages) ,
- Manual (543 pages)
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Figure 1-22 Teen ringing - coded ringing scheme
0
PDN (1FR)
1 1 s s
SDN 1
0 0 . . 5 5 s s
SDN 2
0 0 . . 5 5 s s
SDN 3
0
Figure 1-23 Teen ringing - frequency selective 30 Hz
0
PDN (1FR)
0 0 . . 9 9 0 0 s s
SDN 1
0 0 . . 4 4 5 5 s s
SDN 2
0 0 . . 4 4 5 5 s s
SDN 3
0
In SCMs the teen ringing follows the coded 20 Hz pattern, with long rings
being 1s and short rings being 0.5 s.
Japan ringing (ringing type C3D)
This section describes physical ringing for DMS-100 switching equipment
provisioned in the Japanese public switching telephone network. The physical
ringing patterns described in this section are used for Japanese plain ordinary
telephone system (POTS) lines and Meridian business set (MBS) lines.
Ringing is provided for NT6X33 and NT6X21 line cards on remote line
concentrating modules (RLCM).
The standard ring cycle for the public switching telephone network in Japan is
a total cycle time of 6 seconds. The diagram that follows shows distinctive
6 s
1
2
3
4
5
2 2 s s
1 1 s s
1 1 s s
0 0 . . 5 5 s s
0 0 . . 5 5 s s
1 1 s s
1
2
3
4
5
1
2
3
4
5
2 2 s s
0 0 . . 9 9 0 0 s s
0 0 . . 4 4 5 5 s s
0 0 . . 9 9 0 0 s s
0 0 . . 4 4 5 5 s s
0 0 . . 9 9 0 0 s s
1
2
3
4
DMS-100 Family DMS-100 Ringing System BASE15 and up
DMS-100 ringing overview 1-25
6
7
8
9
6
7
8
9
6 s
6
7
8
9
5
6
7
8
9
10
11
10
11
10
11
10
11
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