Ds0 Trunk Conditioning; Configuring The Cbr Serial Port - 3Com SuperStack II PathBuilder S330 Reference Manual

126 C 4: C
HAPTER ONFIGURING
Configuring the CBR
Serial Port
P B S330/S310 M
ATH UILDER ODULES
CRC-4 (E1 only)—Enables (yes) or disables (no) Cyclic Redundancy Check 4
(CRC-4) information. CRC-4 is a framing option that checks for errors in data. It is
a communication check for parity/framing and is used for performance monitoring
in E1 networks. CRC4 can be enabled only in structured and multi-frame mode.
Admin Status—Administrative status: Out of Service or In Service.
5 Select [10] Previous Menu to return to the CBR T1-DSX or CBR E1 Configuration
Selection menu.
6 Repeat steps 3and 4 for the other CBR T1-DSX or CBR E1 ports you want to
configure.

DS0 Trunk Conditioning

When the PathBuilder S330 is powered up, all DS0 channels on the T1 are trunk
conditioned, six DS0s at a time. This trunk conditioning readies the PBX for voice
communication. It is performed using TC1 signaling bits first and then TC2
signaling bits. The trunk conditioning stays in the each state (TC2 then TC3) for
one second. The DS0s that are not assigned to a PBC stay trunk conditioned,
forcing the PBX not to use them.
If there is an alarm state or any error condition that will impact traffic, the affected
DS0 channels are trunk conditioned using TC1 signaling bits first, and then TC 2
signaling bits. The trunk conditioning stays in the each state (TC1 then TC2) for
one second. This trunk conditioning prevents calls from being placed over a bad
line.
To configure the CBR serial port, follow these steps:
1 From the Configuration Management menu, select [1] Manage Card.
2 From the List Card menu, shown earlier in Figure 51, select [7] CBR. The CBR
T1-DSX or CBR E1 Configuration Selection menu appears, as shown in above in
Figure 93.
3 Select [4] Port 4 (V.35) to display the CBR T1-DSX/E1 V35 Configuration menu.
Figure 97 shows the CBR E1 V35 Configuration menu. The CBR T1-DSX V.35
Configuration menu is the same.
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ORTS AND PPLICATIONS