NEC SV8500, Manual

Page: 983 / 3438

VOL.2-730
MG-BRI
Note 1:
Cable of external hold tone source needs to be conformed with all-purpose 3.5
φ
mono-aural ear phone
jack. Adjustment of output level for external hold tone source needs to be started from low and to higher.
to avoid the over-signal. The tuning of volume level sent is to be done by monitoring from the telephone
terminal connected over the ISDN network and tuning the output level of external hold tone source or tun-
ing the gain with the AMGIL command. Gain tuning can be done by following four steps of “0dB”, “-
10dB”, “-15dB”, “-20dB”. Input impedance from the external hold tone source needs to be within the
ranges of 8
Ω
- 50k
Ω
. Make sure not to exceed this range.
11.5.3 Cable connection
This section explains the cable connection procedure. Connect the cable following the diagram shown be-
low.
1. Connect the Ground cable (below 10 Ω ) to the Grounding connector.
Name Function Note
Ether RJ-45 for Ethernet connection. Common use of 10/100M
LINE 0 8 pin modular jack for ISDN line 0.
LINE 1 8 pin modular jack for ISDN line 1.
EMA_TEL 8 pin modular jack for Emergency Telephone Terminal.
RS-232C RS-232C connector for external maintenance terminal (PC) [plug type con-
nector]
MUSIC 3.5 φ mono-aural jack for hold tone input from the external recording device.
Note 1
RESET Reset switch
POWER DC input jack for AC power adapter connection.
Backside
Ether
EMA TEL
LINE 0 LINE 1 RS-232C RESET MUSIC
Connect to Ground
(Below 10 Ohm)