Figure 4-34 Scsi2-2Hssi - Cisco MGX 8850 Installation And Configuration Manual

Figure 4-34
Four-Port FRSM for V.35
The MGX-FRSM-HS1/B supports four V.35 ports. Each port can operate in DTE or DCE mode, and
a DTE port has two available clock sources. You can change the line parameters from the defaults
after you activate the line. Refer to Chapter 6, "Card and Service Configuration" for a description
card, line, and port configuration. Note that the MGX-FRSM-HS1/B does not support redundancy,
so card locations are unaffected by this feature. An illustration of the MGX-FRSM-HS1/B front card
appears in Figure 4-35. The multifunction 12IN1-S4 back card appears in Figure 4-36.
For the MGX-FRSM-HS1/B, the choice of cabling establishes the mode as DCE or DTE. The model
number of this cabling is 12IN1. With a DTE type of 12IN1 cable, you can also specify the clock
source as either line or ST (a pin in the DTE cable). With a DCE type of 12IN1 cable, the clock source
is the MGX-FRSM-HS1/B. See Table 4-2 for the relationship between cabling and modes.
Table 4-2
Mode
DTE
DCE
DTE_ST
SCSI2-2HSSI
Cabling and Clock Source for the MGX-FRSM-HSSI-HS1/B
Type of Cable Clock Source
DTE line
DCE internal
DTE ST line
Frame Service Modules
Mode of Remote End
DCE
DTE
DCE
Enclosure and Card Installation 4-37