Specifications
76 Digital Key Bx, Digital 400 & Digital 1000 Configuration Capabilities
In the DIGITAL KEY BX system, four loop start CO
circuits are provided on the MPD card. The minimum
configuration of 4/16 (four outside lines and 16 stations)
requires only two cards - the MPD and one ELD. In
the DIGITAL 400 system, the minimum configuration
requires an MPD card, an ELD card, and a trunk card
for an 8/16 configuration (eight outside lines and 16
stations). Both systems are expanded by the addition
of modular cabinets, peripheral cards, terminal
equipment, and external options. The table below lists
the peripheral cards and shows the capacity of each
card.
FunctionNumber
of ports
Card*
Maximum # of cards
DIGITAL 400*
Maximum # of cards
DIGITAL KEY BX*
(not more than
1 per cabinet)
***
COL
CHL
COG
DID
EMD
PRI24
PRI30
N24
N12
N30
N20
N10
BRT
BHT
T1
E1
E1MFC-R2
8
4
8
8
4
23
30
23
12
30
20
10
4
2
24
30
30
Loop-start outside lines
Loop-start outside lines
Ground-start or loop-start outside lines
Direct Inward Dialing circuits
E&M tie line trunks
ISDN 24 (23B+D) Primary Rate Interface for outside lines (23 ISDN
outside lines on one PRI carrier)
ISDN 30 (23B+D) Primary Rate Interface for outside lines (30 ISDN
outside lines on one PRI carrier)
ISDN 24 (23B+D) DPNSS or QSIG Networking Interface
ISDN 12 (12B+D) DPNSS or QSIG Networking Interface
ISDN 30 (30B+D) DPNSS or QSIG Networking Interface
ISDN 20 (20B+D) DPNSS or QSIG Networking Interface
ISDN 10 (10B+D) DPNSS or QSIG Networking Interface
ISDN2 (2B+D) ISDN Basic Rate Interface for outside lines
ISDN2 (2B+D) ISDN Basic Rate Interface for outside lines
T1 carrier (equivalent to 24 PCM trunks on one T1 carrier)
E1 carrier protocol R2 (equivalent to 30 PCM trunks
on one E1 carrier)
E1 carrier protocol MFC-R2 (equivalent to 30 PCM trunks
on one E1 carrier)
6
12
6
6
12
2
2
2
4
2
3
5
6
12
2
2
2
18
36
18
18
36
6
5
6
12
5
8
15
18
36
6
5
5
Maximum # of cards
DIGITAL 1000*
(not more than
1 per cabinet)
(not more than
1 per cabinet)
(not more than
2 per cabinet)
(not more than
1 per cabinet)
(not more than
1 per cabinet)
(not more than
2 per cabinet)
(not more than
4 per cabinet)
(not more than
4 per cabinet)
(not more than
4 per cabinet)
(not more than
10 per cabinet)
(not more than
4 per cabinet)
(not more than
6 per cabinet)
(not more than
12 per cabinet)
32
58
32
32
58
12
9
12
22
9
13
26
32
58
11
9
9
(not more than
10 per cabinet)
(not more than
10 per cabinet)
(not more than
8 per cabinet)
(not more than
8 per cabinet)
(not more than
12 per cabinet)
* Not all cards are available in every country.
** These maximums are based on defining and activating all ports on each card.
*** Two EMD TIE ports if four-wire audio is used.