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Service Module Back Cards
Service Module Back Cards
The available MGX 8220 back cards are as follows.
T1 Backcards
The MGX 8220 shelf provides back cards for service modules that connect to 4 T1, 4 E1, 8 T1, and 8
E1 lines. Depending upon the number of ports and the type of line (T1 or E1) DB-15, BNC, RJ-48, and
SMB connectors are used. The possible back cards (see Figure 4-16) are
•
•
•
•
•
•
The back cards provide the physical line connections to either the T1 or E1 lines and communicate with
their front cards through the MGX 8220 backplane. A front card/back card set must always be installed
in the same slot position.
X.21 Back Cards
The FRSM-HS1 uses a back card that supports 4 X.21 ports using DB-15 connectors. Each port can
support up to 4 Mbps.
DB15-4X.21-BC
The X.21 Physical interface specifies a DB-15 female connector (DCE type according to ISO 4903.)
Pin functions can be controlled in software to change from DCE to DTE. A converter cable can be used
to convert X.21 to V.35, if necessary.
Table 4-6 lists the supported line speeds for the FRSM-HS1.
Table 4-6
48000
168000
320000
512000
1792000
3157000
Cisco MGX 8220 Installation and Configuration
4-32
DB15-4T1-BC
DB15-4E1-BC
BNC-4E1-BC
RJ48-T1-BC
RJ48-E1-BC
SMB-E1-BC
Configurable Line Speeds in bits per second
56000
192000
336000
768000
1920000
4096000
64000
112000
224000
256000
384000
392000
1024000
1536000
1984000
2048000
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
128000
280000
448000
1544000
3097000
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