Dk40I Isdn - Toshiba Strata DK14 Installation And Maintenance Manual

7. Each Tie or DID line PCB installed provides four Tie or DID lines and does not use four
station ports as in the DK40 (PEMU, REMU, RDDU, and RDDU).
8. RWIU can be installed in any of the expansion cabinet slots (15, 16, 17, and 18) to support up
to 8 StrataLink handsets. If there are 9 to 16 handsets, the RWIU must be installed in slot 15
and slot 16 must be vacant. This system cannot support 24 or 32 handsets because of a port
limitation.

DK40i ISDN

Configure DK40i, ISDN BRI PCBs (RBSU, RBSS and TBSU) with the following rules
1. TBSU installs in the base cabinet to provide 2 BRI S/T circuits, each circuit can be station side
or line side in any combination.
2. If a TBSU is installed, TDDU or TCOU cannot be installed. Only one PCB (TSBU, TCOU or
TDDU) can be installed in the DK40i base cabinet for a given DK40i configuration.
3. RBSU installs in any expansion unit slot to provide 2 BRI S/T circuits which can be station
side or line side in any combination.
4. RBSS installs on an RBSU in any expansion unit slot to provide 2 BRI S/T circuits, which can
be station side only.
5. Each RBSU, RBSS and TBSU ISDN BRI circuit uses two station ports and no line numbers if
the circuit is configured for station side. This is different from the DK424 ISDN in which each
BRI circuit uses two station ports and two line numbers when the circuit is configured for
station side.
6. Each RBSU and TBSU ISDN BRI circuit will use two line numbers and no station ports if the
circuit is configured for the line side. This is different from DK424 ISDN, in which each BRI
circuit uses two station ports and two line numbers when the circuit is configured for line side.
7. Total maximum BRI S/T circuits on the station side is 10 (20 ports/B-channels max.).
8. Total maximum BRI S/T circuits on the CO line side is 6 (12 lines/B-channels max.).
Strata DK I&M 5/99
DK40i Configuration
Configuration Considerations
2-15