Cisco Systems MGX 8220 manual Service Module Back Cards, T1 Backcards, DB15-4X.21-BC, SMB-E1-BC

Chapter

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

•DB15-4T1-BC

•DB15-4E1-BC

•BNC-4E1-BC

•RJ48-T1-BC

•RJ48-E1-BC

•SMB-E1-BC

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 4-6lists the supported line speeds for the FRSM-HS1.

Table 4-6 Configurable Line Speeds in bits per second

48000	56000	64000	112000	128000
168000	192000	224000	256000	280000
320000	336000	384000	392000	448000
512000	768000	1024000	1536000	1544000
1792000	1920000	1984000	2048000	3097000
3157000	4096000

	Cisco MGX 8220 Installation and Configuration
4-32	Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003