363-206-285
Shelf Descriptions and Configurations
3-22 Issue 3 June 2001
LAN Interface 3
Figure 3-13 shows examples of BBG2B MXRVO circuit packs in function unit B,
coupled with BBF9 or BBF10 LAN circuit packs in slots 1 through 6 of low-speed
group B.
*
BBG2B or BBG2 MXRVOs can be used when LAN circuit packs are
installed in low speed slots. A LAN circuit pack uses two low speed slot positions
and is not protected.
In function unit B the BBG2B supports one to three LAN interfaces, the LANs are
connected through the backplane to the BBG2Bs in function unit group B. The
LAN circuit packs convert a 100BaseFX LAN optical signal or a 10/100BaseT
electrical signal and pass it on to the BBG2Bs. These interfaces provide for either
electrical or optical LANs. A maximum of three LAN circuit packs are allowed per
LOW SPEED GROUP. Both FUNCTION UNITS slots must be equipped with
MXRVO circuit packs. Mixing with DS1, DS1PM, or T1EXT circuit packs is
allowed within the same LOW SPEED GROUP.
Equipping the main slots with 22-type, 24-type, 27-type, or 29-type OLIUs support
a LAN interface.
Figure 3-13. OC-3/OC-12 Shelf with LAN Interface
* The example in Figure 3-13 uses a Group 4 shelf. If a Group 3 shelf is used, the
G3 to G4 Front Cover Upgrade Kit must be installed for proper cable dressing.
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1
5
C
T
G
2
T
G
1
O
L
I
U
O
L
I
U
111
A
B
S
Y
S
C
T
L
U
S
E
R
A
N
E
L
P
AUXCTL
SYSCTL
2(P) 2(P) 2(P) 2(P)
8(P)
O
H
C
T
L
Timing Main
Group A Group B Group C
Function Units
Low Speed
B
B
G
2
B
B
B
G
2
B
B
B
G
2
B
B
B
G
2
B
B
B
F
10
B
B
F
9
B
B
F
7
B
B
F
7
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