NEC NEAX2000 IVS ND-45492 - Manual (Page 141)

CHAPTER 3 ND-45492 (E)
Page 124
Revision 2.0
(11) External Tone Source Equipment
The cross connection for a customer owned external tone source equipment is shown in Figure 007-32
through Figure 007-34 as an example.
Requirement for the External Tone Source Equipment
• Output level : Less than 0 dBm (Adjustable)
• Output impedance : Less than 1 k
Ω
(When using PN-4COT and PN-DK00)
: Less than 10 k
Ω
(When using Pin Jacks on PN-TNTA)
• Control Method : Start - Ground Start Note 1
: Stop - Ground Off (Open)
Note 1: The current capacity of relay driver (PN-DK00 card) is 0.125 A.
Note 2: When connecting the external tone source equipment using the PN-4COT and PN-DK00 cards, an appro-
priate diode must be installed on the MDF, as shown in
Figure 007-32 .
NAP 200-007
Sheet 39/56
Termination of Cables on the MDF