3Com Nbx 100 And Ss3 Nbx Administration Guide

							Configuring and Managing E1 Digital Line Cards261
If the DDI/DID numbers match your internal extension numbers, the 
translator entries in your Dial Plan configuration file can be much simpler.
Example: You plan to use internal extensions from 100 through 299, 
and the local telephone company assigns you numbers from 
617-555-4100 through 617-555-4299. If the local telephone carrier 
passes you three digits, you need no translator entries in the Dial Plan 
configuration file. If the carrier passes you four digits, you could add a 
single set of translator entries to the configuration file to remove the first 
digit (4) and use the remaining three digits as the internal extension.
Enabling Auto Discovery for Digital Line Cards
To enable Auto Discovery for Digital Line Cards:
1Log in to the NBX NetSet utility using the administrator login ID and 
password.
2In the NBX NetSet - Main Menu window, click System Configuration.
3In the System Configuration window, click the System Settings tab.
Other check boxes may be selected based upon previous 
Auto Discoveries. You do not need to clear these check boxes to install 
the E1 card.
4Click the Auto Discover Digital Line Cards check box. It does not matter if 
any of the other check boxes are selected.
5Click OK.
Inserting the E1 Digital Line Card
You do not need to remove the power cable from the chassis before you 
insert the E1 card.
To insert the E1 Digital Line Card into the chassis:
1Write down the MAC address of the E1 card.
2Select a slot for the E1 card in the chassis, and use a Phillips screwdriver 
to remove the blank faceplate from the slot.
3Insert the E1 card into the slot.
4Slide the E1 card into the chassis until you feel it touch the connectors.
5To seat the E1 card into the connectors, press the front of the card firmly. 
						

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6Tighten the left and right screws on the front of the E1 card.
7Wait 3 minutes.
CAUTION: When you insert the E1 Digital Line Card, it begins an 
initialization sequence. Also, because you enabled the Auto Discover 
Digital Line Cards check box, the system recognizes the addition of the 
E1 card and begins to update its database. Allow 3 minutes for both of 
these processes to be completed.
You are now ready to configure the E1 Digital Line Card.
Configuring the
E1 Digital Line CardThese sections tell you how to use the NBX NetSet utility to set up your 
E1 Digital Line Card parameters.
■Configuring for ISDN PRI Signaling
■Configuring E1 Groups
■Verifying E1 Group Membership
■Completing the E1 Configuration
Before you configure an E1 card, you must configure the Dial Plan as 
described in Chapter 2
.
Configuring for ISDN PRI Signaling
Before you configure the E1 card, read the cautionary note. This section 
describes how to configure an E1 Digital Line Card for ISDN PRI (Primary 
Rate Interface) signaling.
CAUTION: Before you configure the E1 card, you must wait 3 minutes 
after you insert the E1 card into the chassis.
1In the NBX NetSet - Main Menu window, click Device Configuration.
2Select the Digital Line Cards tab.
3Use the MAC address of the E1 card to identify the board in the T1/ISDN 
Board List. You recorded this address before inserting the board into the 
chassis.
4Select the E1 board from the T1/ISDN Board List and click Modify 
(Figure 94
). 
						

							Configuring and Managing E1 Digital Line Cards263
Figure 94   Modify Board Dialog Box — ISDN PRI
5Scroll through the Channel List to verify that the system lists all 
30 channels. Figure 94
 shows the first few channels. The channel 
numbers appear after the MAC address, separated by a dash.
Example: In the figure, the fourth line appears as:
1...00:e0:bb:04:4e:a5-4 Trunk
The 4 after the dash indicates channel number 4.
6To change the name of the E1 board, edit the contents of the Board 
Name field. This name helps you identify the E1 board in a list.
7Enable the On Line check box.
8Click Apply and then click OK.
To connect the E1 line and activate the span:
1Plug the E1 line into the E1 board.
2Select ISDN PRI Span List from the Card Type pull-down list.
3Select the E1 span from the list and click Modify.
4Click the On Line check box.
5Click Apply. 
						

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To verify that the span status changes from Offline to Ready:
1Return to the Digital Line Cards tab.
2Select ISDN PRI Span List from the Select Device Type list.
3Click Apply.
Configuring E1 Groups
To configure the E1 Groups:
1Return to the Digital Line Cards tab.
2From the Select Device Type list, select ISDN PRI Group List.
3Click Apply.
4From the ISDN PRI Group List, select PRI Group 1.
5Click Modify. The Modify Group dialog box (Figure 95
) appears.
Figure 95   Modify Group Dialog Box
6Select Restricted from the Tr u n k  t o  Tr u n k pull-down list.
If you select Unrestricted, users can transfer incoming calls to outgoing 
trunks. 3Com does not recommend this setting because it enables the 
possibility of toll fraud.
7Click the On Line check box.
8Enter 500 in each of the four AutoExt text boxes and click OK. 
						

							Configuring and Managing E1 Digital Line Cards265
Verifying E1 Group Membership
To verify that all channels are in the member list:
1Return to the Digital Line Cards tab (Figure 113
).
2In the Select Device Type list, select ISDN PRI Group List and click Apply.
3Select the group that you want, and click Membership (Figure 96
).
Figure 96   Manage Group Membership Dialog Box
4Scroll through the Member List to verify that all 30 channels are present.
Completing the E1 Configuration
To complete the E1 configuration, perform these steps:
1Return to the Digital Line Cards tab.
2In the Select Device Type list, select ISDN PRI Channel List, click Apply.
3Wait approximately 30 seconds for the status of each channel to change 
from Ready to Idle. You can also watch the Nominal status light on the E1 
card front panel. When it stops flashing and stays on, the board is active.
If the channel status does not change to Idle, verify that you have enabled 
the On Line check box for the card and the span.
While you are waiting, you can click Apply to refresh the list of channels 
and to see the updated status. 
						

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E1 Card Status LightsThe E1 card contains these status lights:
■CF — Carrier Fail (when lit, indicates either a red alarm or blue alarm)
■RA — Remote Alarm (yellow alarm)
■LB — Loopback
■Nominal — E1 card is framed
Modifying an E1 CardThese sections tell you how to modify a E1 card that is already installed in 
the system:
■Modifying the E1 Card Name
■Modifying an E1 Span
■Configuring Partial E1 Lines
■Modifying Audio Controls
Modifying the E1 Card Name
You can change the name of an E1 Digital Line Card at any time. The 
name you pick helps you identify the E1 card in device lists.
To modify an E1 card name:
1In the NBX NetSet - Main Menu window, click Device Configuration 
(Figure 97
).
Figure 97   NBX NetSet - Main Menu Window 
						

							Configuring and Managing E1 Digital Line Cards267
2Select Device Configuration > Digital Line Cards (Figure 98).
Figure 98   Digital Line Cards Tab
3Select the board in the T1/ISDN Board List, and click Modify (Figure 99).
Figure 99     Modify Board Dialog Box 
						

							268CHAPTER 3: DEVICE CONFIGURATION
4In the Board Name field, you can enter a name for the board, if you want, 
or you can accept Tr u n k, the default name that the NBX system assigns. 
The name that you enter helps you to identify the board in device lists.
Modifying an E1 Span
To modify an E1 span:
1Return to the Digital Line Cards tab.
2From the Select Device Type pull-down list, select ISDN PRI Span List 
3Click Apply.
4Select the span you want to modify from the Span List.
5Click Modify. Figure 100
 shows the ISDN PRI Modify Span dialog box.
Figure 100   Modify Span Dialog Box — ISDN PRI 
						

							Configuring and Managing E1 Digital Line Cards269
6Make the desired changes. Table 46 lists all span parameters for 
reference. The number of channels supported per span depends on the 
configuration of the Digital Line Card. E1 cards support 30 channels per 
span.
7Click Apply.
8Enable the On Line check box to bring the span online.
Before the span can come online, the board must be online.
9Click Apply for the changes to take effect.
10Click OK.
Configuring Partial E1 Lines
Some telephone companies offer an E1 line that has less than the 
maximum number of channels implemented. This is called a Fractional, 
Partial, or Subequipped E1. Example: To reduce near-term costs, you may 
decide to purchase 15 channels now and implement more later in order.
Table 46 Span Parameters
ParameterE1 ISDN PRI Options
Span NameA name that helps you identify this span in lists.
Interface TypeE1*
CO Switch ProtocolETSI**
Framing TypeMultiframe with CRC4*
Double Frame (Multiframe without CRC4)*
Line CodeAMI*
HDB3*
Line LengthN/A - E1
Timing ModeN/A
Terminal Endpoint Identifier (TEI)N/A
*When this value is changed, the card reboots itself and all current calls on the card are lost.
**When this value is changed, the card is temporarily offline, and all current calls on the card 
are lost. 
						

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Some telephone companies offer Partial E1 lines as their standard 
offering and provide fully implemented E1 lines only if you make a 
specific request. If you are unaware of this, outbound calls using the E1 
line may fail because the system places outbound calls using high 
numbered channels first, and a Fractional E1 typically has the lower 
numbered channels implemented.
In the Span Status dialog box, under Details of last five calls, if you see the 
error message REQ_CHANNEL_UNAVAIL, determine if the error is caused 
by a Partial E1:
1Remove the highest numbered channel from service (set it to offline in 
the Modify Channel dialog box) and retry the outbound call.
2Continue to remove channels until an outbound call succeeds.
3When the first outbound call succeeds, the highest numbered channel 
still in service represents the number of active (provisioned) channels in 
the Partial E1.
4Create two groups. Put all of the active channels in one group, and all of 
the inactive channels in the other. Mark the active group “online” and 
the inactive group “offline.”
Modifying Audio Controls
In a normal environment, do not change the Audio Controls from their 
default settings. If you have an issue with sound quality and you cannot 
resolve it using the volume controls on the NBX Telephones, contact your 
technical support representative.
CAUTION:Do not change your Audio Controls settings unless you are 
instructed to do so by a qualified support representative.
Adding or Modifying
an E1 GroupA digital line card group is one or more E1channels that are assigned the 
same characteristics, such as Channel Protocol. This section describes 
how to perform these actions:
■Adding an E1 Group
■Modifying an E1 Group
■Changing E1 Group Membership
■Removing an E1 Group
CAUTION: Modifying an E1 group disconnects any calls in process on any 
channels associated with the group.