Toshiba Strata DK14 General Description Manual page 39

Tables 16~19 show system maximum capacity examples with ISDN BRI (S/T and/or U) circuits.
Table 16 RCTUA Maximum Capacity Examples with ISDN BRI (S/T and/or U-type) Circuits
BRI Station
1
Circuits B channels
2
8
6
5
4
4
3
2
1
Table 17 RCTUBA/BB Maximum Capacity Examples with ISDN BRI (S/T and/or U-type) Circuits
BRI Station
1
Circuits
2
16
12
10
8
8
8
8
6
6
6
4
4
2
1. Each BRI circuit (S/T and/or U-type) provides two B channels plus one D channel and reduces the
system capacity by two station ports and two CO lines. Each (S/T) BRI station circuit allows up to two
TE-1 and TA devices to share the BRI B channels (two simultaneous calls maximum per BRI circuit.).
Each BRI-U circuit supports one TE-1 or TA device.
2. Maximum BRI capacity.
3. Other stations include Toshiba digital and electronic telephones, or attendant consoles, standard
telephones and devices.
4. BRI S/T circuits are available with RBSU/RBSS PCBs and BRI-U circuits are available with RBUU/
RBUS PCBs. ISDN BRI PCBs will be available with a future release of DK424 software. Each BRI
line circuit (S/T or U) provides two BRI CO lines (B channels) for incoming/outgoing calls.
5. Other lines include analog and digital (T1 or PRI) loop start, ground start, DID, and Tie lines.
Strata DK General Description
BRI Station Other Station
1 3
Circuits
2
16 16
12 16
10 16
8 16
8 16
6 16
4 24
2 28
Other
BRI Station
Station
1
B channels
3
Circuits
2
32 32
24 40
20 40
16 48
16 48
16 56
16 56
12 56
12 56
12 64
8 64
8 64
4 72
5/99
BRI Line BRI Line
4 4
Circuits B channels
0 0
2 4
3 6
2 2
4 8
2 4
1 2
2 4
1 2
BRI Line BRI Line
4 4
Circuits B channels
2 2
8 16
8 16
8 16
8 16
6 12
4 8
2 4
6 12
4 8
2 4
4 8
2 4
2 4
Strata DK424
Maximum Line/Station Capacities
Other Line
5
Circuits
0
0
0
0
4
8
8
12
Other Line
5
Circuits
0
8
12
16
20
24
28
24
28
32
32
32
40
25