Line Number

Allocated by the system.

Card/Module

Indicates the card slot or expansion module being used for the trunk device providing the line.

For IP500 V2 control units: 1 to 4 match the slots on the front of the control unit from left to right.  Expansion modules are numbered from 5 upwards, for example trunks on the module in Expansion Port 1 are shown as 5.

Port

Indicates the port on the Card/Module above to which the configuration settings relate.

Network Type

Default = Public.

This option is available when System | Telephony | Telephony | Restrict Network Interconnect  is enabled. It allows you to configure trunks as either Public or Private.

• The IP Office will return number busy indication to any attempt to connect a call on a Private trunk to a Public trunk or the opposite.

• The call restriction includes transfers, forwarding and conference calls.

• Avaya does not recommended use of this feature on IP Office systems using any of the following features:  multi-site networks, VPNremote, application telecommuter mode.

Line Sub Type

: Default = PRI

Set to PRI. If set to T1 see Line Form (T1). If set to ETSI, ETSI CHI, QSIG A or QSIG B see Line (E1).

QSIG trunks trunks are not supported on IP500 V2 systems without IP500 Voice Networking licenses.

Channel Allocation

Default = 23 | 1

The order, 23 to 1 or 1 to 23, in which channels are used.

Switch Type

Default = NI2

The options are: 4ESS, 5ESS, DMS100, NI2.

Provider

Default = Local Telco

Select the PSTN service provider (AT&T, Sprint, WorldCom or Local Telco).

Prefix

Default = Blank

Enter the number to prefix to all incoming numbers for callback. This is useful if all users must dial a prefix to access an outside line. The prefix is automatically placed in front of all incoming numbers so that users can dial the number back.

Add 'Not-end-to-end ISDN' Information Element

Default = Never*.

Sets whether the optional 'Not end-to-end ISDN' information element should be added to outgoing calls on the line. The options are: Never, Always, POTS (only if the call was originated by an analog extension).

*The default is Never except for the following locales; for Italy the default is POTS, for New Zealand the default is Always.

Progress Replacement

Default = None.

Progress messages are defined in the Q.931 ISDN connection control signaling protocol. Generally, if a progress message is sent, the caller does not get connected and so typically does not accrue call costs.

Not all ISDN lines support Q.931 Progress messages. Use this setting to configure alternative signaling to the ISDN line for internally generated Progress messages. The options are:

• Alerting: Map to Q.931 Alerting. The call is not connected. The caller does not hear the message and typically does not accrue call costs.

• Connect: Map to Q.931 Connect. The caller hears the message and typically will accrue call costs.

Send Redirecting Number

Default = Off.

This option can be used on ISDN trunks where the redirecting service is supported by the trunk provider. Where supported, on twinned calls the caller ID of the original call is passed through to the twinning destination. This option is only used for twinned calls.

Send Names

This option is available when the Switch Type above is set to DMS100. If set, names are sent in the display field. The Z shortcode character can be used to specify the name to be used.

Names Length

Set the allowable length for names, up to 15 characters, when Send Names is set above.

Test Number

Used to remember the external telephone number of this line to assist with loop-back testing. For information only.

Framing

Default = ESF

Selects the type of signal framing used (ESF or D4).

Zero Suppression

Default = B8ZS

Selects the method of zero suppression used (B8ZS or AMI ZCS).

Clock Quality

Default = Network

Refer to the IP Office Installation Manual for full details. This option sets whether the system should try to take its clock source for call synchronization and signalling from this line. Preference should always be given to using the clock source from a central office exchange if available by setting at least one exchange line to Network.

• If multiple lines are set as Network, the order in which those lines are used is described in the IP Office Installation Manual. If additional lines are available, Fallback can be used to specify a clock source to use should the Network source not be available.

• Lines from which the clock source should not be taken should be set as Unsuitable.

• If no clock source is available, the system uses its own internal 8KHz clock source.

• In scenarios where several systems are network via digital trunk lines, care must be taken to ensure that all the systems use the same clock source. The current source being used by a system is reported within the System Status Application.

CSU Operation

Tick this field to enable the T1 line to respond to loop-back requests from the line.

Haul Length

Default = 0-115 feet

Sets the line length to a specific distance.

Channel Unit

Default = Foreign Exchange

This field should be set to match the channel signaling equipment provided by the Central Office. The options are: Foreign Exchange, Special Access, Normal.

CRC Checking

Default = On

Turns CRC on or off.

Line Signaling

The field can be set to either CPE (Customer Premises Equipment) or CO (Central Office). This field should normally be left at its default of CPE. The setting CO is normally only used in lab back-to-back testing.

Incoming Routing Digits

Default=0 (present call immediately)

Sets the number of routing digits expected on incoming calls. This allows the line to present the call to the system once the expected digits have been received rather than waiting for the digits timeout to expire. This field only affects T1 line channels set to E&M Tie, E&M DID, E&M Switched 56K and Direct Inward Dial.

Admin

Default = In Service.  

This field allows a trunk to be taken out of service if required for maintenance or if the trunk is not connected.

Send original calling party for forwarded and twinning calls

Default = Off.

Use the original calling party ID when forwarding calls or routing twinned calls.

This setting applies to the following ISDN lines:

• PRI24 with subtypes: PRI, QSIGA, QSIGB, ETSI, ETSI CHI.

• PRI30 with subtypes: QSIGA, QSIGB, ETSI, ETSI CHI.

Originator number for forwarded and twinning calls

Default = blank.

The number used as the calling party ID when forwarding calls or routing twinned calls. This field is grayed out when the Send original calling party for forwarded and twinning calls setting is enabled.

This setting applies to the following ISDN lines:

• PRI24 with subtypes: PRI, QSIGA, QSIGB, ETSI, ETSI CHI.

• PRI30 with subtypes: QSIGA, QSIGB, ETSI, ETSI CHI.