Toshiba DK14 Installation And Maintenance Manual page 124

DK424 Configuration
Features Capacities
Table 4-13 RCTUA Maximum Capacity Examples with ISDN BRI (S/T and/or U-type) Circuits
BRI Station
1
Circuits
2
8
6
5
4
4
3
2
1
Table 4-14 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 eight 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. Conventional 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 (channels) for incoming/outgoing calls.
5. Conventional lines include analog and digital (T1 or PRI) loop start, ground start, DID, and Tie lines.
4-10
BRI Station Other Station
1
B channels Circuits
2
16 16
12 16
10 16
8 16
8 16
6 16
4 24
2 28
BRI Station Other Station
1
B channels 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
BRI Line
3 4
Circuits B channels
0
2
3
2
4
2
1
2
1
BRI Line
3 4
Circuits B channels
2
8
8
8
8
6
4
2
6
4
2
4
2
2
BRI Line Other Line
4
Circuits
0 0
4 0
6 0
2
8 0
4 4
2 8
4 8
2 12
BRI Line Other Line
4
Circuits
2
16 0
16 8
16 12
16 16
12 20
8 24
4 28
12 24
8 28
4 32
8 32
4 32
4 40
Strata DK I&M
5
5
5/00