NT5K19 Analog Tie Trunk Card 3-7
UK Trunk cards description 553-3001-173
The loss PADs for AC15 and 4-wire E&M trunks are selected by the class
of service (COS) assigned to the trunk data block (LD 14).
•
PADs should be switched OUT when trunks are connected using on-
premise wiring.
(COS = NTC)
•
PADs should be switched IN when trunks are connected using a leased
circuit.
(COS = TRC)
Trunk types description
Each unit on the NT5K19 Analog Tie trunk card can operate as one of the
following:
•
2-wire and 4-wire E&M trunk (DC-5)
•
2280 Hz Tie trunk (AC15)
•
Recorded Announcement (RAN) trunk
•
Paging (PAG) trunk
•
Music (MUS) trunk
•
Emergency Recorder (RCD) trunk.
For information on features and signalling arrangements, see Generic X11
Including Supplementary Features (PO730484, or NTCK09 in the U.K).
2-wire and 4-wire E&M Type 1 trunk operation (DC-5)
The NT5K19 Analog Tie trunk card supports the United Kingdom DC5-A
method of signalling, which is used between a PBX and co-sited
equipment. The two signalling wires used, E and M, are electrically
separated from the associated speech circuit. Signals are sent on the M
wire and received on the E wire.
Send signals
All signals are sent in the form of either Earth-On or Earth-Off applied to
the M wire. Earth-On is the application of ground to the M wire through a
resistance of 1250 ohms, while Earth-Off is the removal of the Earth-On
condition. In both Earth-On and Earth-Off conditions, a grounded 1µF
capacitor is applied to the M wire.
United Kingdom
United Kingdom
United Kingdom
United Kingdom
United Kingdom
United Kingdom
