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M-84
General Description
In the Associated Channel Interoffice Signaling system, this feature allows use of selective codes of
Multifrequency (MF) signals.
MF - (ANSI) codes: A total of 15 codes are available by combining two out of six frequencies.
CCITT/
Code
BELL
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
0
11
C
11
12
C
12
13
KP
1
14
KP
2
15
ST
(ANSI)
Operating Procedure
No manual operation is required.
Service Conditions
1.
When using MF signaling system, Least Cost Routing (LCR) or Register Sender LCR (LCRS)
must be assigned.
2.
Even when LCRS is assigned, digit outpulsing to the distant office is not started until all digits
have been received when the signaling is MF. If there is DP or PB lines among alternate routes,
an outgoing call may be originated by seizing a DP or PB line, even when the route advance
sequence for that line is lower than MF lines. When the route advance sequence of MF to DP or
PB is predetermined, LCR must be assigned in the numbering plan.
3.
Unless otherwise specified, MP starting at termination of an incoming call will be activated upon
receiving an ST signal.
NEAX2400 ICS Business Features and Specifications
NDA-24143, Issue 4
MF Signaling - DID
MF Signaling - DID
0
1
(700Hz)
(900Hz)
X
X
X
X
X
X
X
X
X
X
2
4
(1100Hz)
(1300Hz)
X
X
X
X
X
X
X
X
X
X
M-84
7
K
(1500Hz)
(1700Hz)
X
X
X
X
X
X
X
X
X
X
Page 367
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