Instruction manual

Universal Slot PCBs
Option Interface PCBs
48 Strata DK General Description 6/00
Option Interface PCBs
This section describes the option interface PCBs.
Option Interface Unit (PIOU)
The PIOU provides interfaces for Paging (Amplified, Unamplified, and Zone), SMDR, SMDI for
Voice Mail integration, SMIS for ACD, DKi Admin Interface for on or off-site maintenance, an
Alarm sensor, and a Remote Maintenance Modem subassembly (IMDU) that allows the system to
be programmed from an off-site DKi Admin PC.
♦ DK40i – the PIOU PCBs three-watt or non-amplified 600 ohm paging output is not used since
paging is supported by the Base KSU paging interface.
♦ DK424i – the PIOU provides two-relay contact pairs. One of the contact pairs can be set for
control of a customer-provided door lock or control of a MOH source. The other relay pair can
be configured to mute BGM while the page feature is being activated or for the Night Relay
function.
Simplified Option Interface Unit (PIOUS)
The PIOUS has most of the PIOU’s features, including SMDR output and the TTY output port
interface and IMDU. It also provides flexible relay contacts and an Unamplified Page output. It
does not provide Amplified or Zone Paging.
Remote Maintenance Subassembly (IMDU)
The IMDU is an optional modem that connects to a PIOU or PIOUS to link the system to off-site
programming and maintenance equipment, such as a DKi Admin PC. The IMDU has an internal
maintenance channel and does not require a dedicated CO line or station port. Data transmission
speed can be set at 300 or 1200 bps full duplex.
External Page Interface Unit (PEPU)
The PEPU is a reduced version of the PIOU and PIOUS, providing most of the Paging and Relay
Contact options offered by these other optional PCBs.
Single Serial Interface Unit (RSSU)
The RSSU contains one RS-232 serial port for connecting an SMDI, SMIS processor, DKi Admin/
DKi Backup PC or external modem.
The RSSU provides a cost-effective alternative to the PIOU or PIOUS when only one other serial
I/O port is needed, or when the other features of the PIOU or PIOUS are not required. The RSSU
has a fixed speed of 1200 bps. It does not support SMDR, or the IMDU or RMDS modems.
♦ DK40i – one optional RSSU maintenance interface PCB can be used for connecting a
maintenance PC or external modem (local or remote) to the DK40i.
♦ DK424i – a maximum of three RSSU cards can be supported per system.