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

120 C 4: C
HAPTER ONFIGURING
Configuring the CBR
Serial Port
P B S330/S310 M
ATH UILDER ODULES
The DBA Bits Mask parameter is designed to accommodate situations in which the
PathBuilder S330/S310 must communicate with equipment that uses
non-standard signaling patterns. In most cases you should leave this parameter set
to its default value. If you are experiencing problems with a CCS circuit, however,
you may need to set the DBA Bits Mask to a different value. The PathBuilder
S330/S310 performance monitoring feature reports the data bytes to the cell bus
on the CBR port. You can check this statistic to determine if you need to set a
non-default DBA Bits Mask. For details, see "CBR ATM Statistics" in Chapter 5.
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 switch 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:
1 From the Configuration Management menu, select [1] Manage Card.
2 From the List Card menu, shown earlier in Figure 60, select [7] CBR. The CBR
T1-DSX or CBR E1 Configuration Selection menu appears, as shown in above in
Figure 109.
3 Select [4] Port 4 (V.35) to open the CBR T1-DSX/E1 V35 Configuration menu.
Figure 113 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