Nortel DMS-100 Series Maintenance Manual page 210

5-10 OPM hardware
Channel bank option
The installation of a user-selected channel bank provides special services. The
special services include foreign exchange, non-switched digital data, and
off-premises extensions. The channel bank does not share any operational
functionality with the OPM, except alarms. Alarms require the addition of a
scan card (NT0X10) in the RMM slot 7. The only restrictions on the channel
bank used are the internal environmental and operational restrictions of the
OPM.
DE-4E Smart channel bank
The DE-4E smart channel bank (NT4S42CA) is available from Northern
Telecom. The DE-4E Smart is a 24-channel digital carrier terminal for
two-way transmission of voice and data signals. The signals travel over T1,
T1C, or T2 compatible carrier systems. All classes of switched telephone
trunks and special service voice frequency applications can use the DE-4E.
For more information, refer to the DE-4E Smart Index to Applicable
Publications, 368-5161-001. You also can refer to the DE-4 Enhanced PCM
Channel Bank Description, 368-5151-110.
The DE-4E can only be mounted in the optional equipment shelf of the
OPM-256. Mounting kits required for the DE-4E Smart channel bank are:
•
•
•
The OPMs NT6X60 ringing generators can be used as the DE-4Es ringing
source for single coded 20 hertz application only. Refer to the figure "Bay
frame equipment location for OPM-256 (NT8X01BC)" for a diagram of the
OPM-256 cabinet layout.
297-8361-550 Standard 04.01 September 2000
NT0X1980—Used with OPM-256 equipped with 4-pin protector blocks
NT0X1981—Used with OPM-256 equipped with 5-pin protector block
(without 50ft. cable stub).
NT0X1982—Used with OPM-256 equipped with 5-pin protector block
(with 50ft. cable stub).