3Com 3C780 User Guide - Page 51

STP Cascade Connector

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Installing the Hub 2-11 4. Push the back of the key down until it snaps into place. The key sits flush with the top of the transceiver. If you decide to change the configuration of a fiber module attachment port, you must change the key in the transceiver receptacle. To remove a key from the receptacle, follow these steps: 1. Remove the attached cable from the transceiver. 2. Remove the module from the hub. Refer to the section "Removing Modules" later in this chapter. 3. Place the tip of a small, flat screwdriver in the slot at the back of the key and exert gentle but firm pressure on the screwdriver. 4. Remove the key. Replace the removed key in its plastic bag for possible future use. 5. Insert the appropriate key into the transceiver. Reinsert the module into the hub and insert the different cable into the rekeyed transceiver. STP Cascade Connector By default, all ports on the STP module are physically configured as M ports. If you want to configure the STP module's attachment ports differently, you must use an STP cascade connector to allow the use of these ports as B, A, or S port types. NOTE: A module's attachment ports are the two leftmost ports when a module is installed in slot 1. Whenever a module is installed in a slot other than shot 1, the two leftmost ports are no longer designated "attachment ports."

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2-11
Installing the Hub
4.
Push the back of the key down until it snaps into place.
The key sits flush with the top of the transceiver.
If you decide to change the configuration of a fiber module attachment port, you
must change the key in the transceiver receptacle.
To remove a key from the
receptacle, follow these steps:
1.
Remove the attached cable from the transceiver.
2.
Remove the module from the hub.
Refer to the section “Removing Modules” later in this chapter.
3.
Place the tip of a small, flat screwdriver in the slot at the back of the
key and exert gentle but firm pressure on the screwdriver.
4.
Remove the key.
Replace the removed key in its plastic bag for possible future use.
5.
Insert the appropriate key into the transceiver.
Reinsert the module into the hub and insert the different cable into the
rekeyed transceiver.
STP Cascade Connector
By default, all ports on the STP module are physically configured as M ports.
If
you want to configure the STP module’s attachment ports differently, you must
use an STP cascade connector to allow the use of these ports as B, A, or S port
types.
NOTE:
A module’s attachment ports are the two leftmost ports when a module
is installed in slot 1.
Whenever a module is installed in a slot other than shot 1,
the two leftmost ports are no longer designated “attachment ports.”