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Configuring Channelized T1/E1/ISDN PRI interfaces with a Configuration Editor

Each port on a channelized T1/E1/ISDN PRI PIM is software configurable as a T1 or E1 clear channel. You can partition each port into up to 24 DS0 channels on a T1 interface or up to 31 DS0 channels on an E1 interface, and can insert channels from one port into another with the drop-and-insert feature.

Channelized T1/E1/ISDN PRI ports can also be partitioned into channels for ISDN PRI service.

Channelized T1/E1/ISDN PRI interfaces are configured through a configuration editor only.

This section includes the following topics:

Configuring Channelized T1/E1/ISDN PRI Interface as a Clear Channel

To configure or edit a channelized T1/E1/ISDN PRI interface as a clear channel:

  1. Navigate to the top of the configuration hierarchy in either the J-Web or CLI configuration editor.
  2. Perform the configuration tasks described in Table 50.
  3. If you are finished configuring the J-series device, commit the configuration.
  4. To verify the configuration, see Verifying Interface Configuration.

Table 50: Configuring a Channelized T1/E1/ISDN PRI interface as a Clear Channel

Task

J-Web Configuration Editor

CLI Configuration Editor

Navigate to the Interfaces level in the configuration hierarchy.

For information about interface names, see Network Interface Naming.

  1. In the J-Web interface, select Configuration>Edit Configuration>View and Edit.
  2. Next to Interfaces, click Edit.

From the [edit] hierarchy level, enter one of the following:

edit interfaces ct1-3/0/0

edit interfaces ce1-3/0/0

Create the new interface—for example, ct1-3/0/0 or ce1-3/0/0.

  1. Next to Interfaces, click Add new entry.
  2. In the Interface name box, type one of the following interface names:
    • ct1-3/0/0
    • ce1-3/0/0
  3. Click OK.

Configure interface options:

  • Specify a transmit clock source—for example, internal. Internal clocking uses the device’s own system clock (the default).

    External clocking uses a signal received from the T1 or E1 interface.

  • Describe the physical interface.
  • To delay the advertisement of interface transitions from up to down or down to up, set the link hold down time or link hold up time, or both. Set a value in milliseconds from 0 (the default) through 65534—for example, 500.
  • To use the channelizable interface as a single clear channel, specify no partition.
  • To use subunit queuing on Frame Relay or virtual LAN (VLAN) IQ interfaces, enable the per-unit scheduler.
  1. In the Interface table, under Interface name, click the interface you are configuring:.
    • ct1-3/0/0
    • ce1-3/0/0
  2. From the Clocking list, select internal.
  3. In the Description box, type one of the following descriptions:
    • clear t1 interface
    • clear e1 interface
  4. Under Hold time:

    Next to Down, type 500.

    Next to Up, type 500.

  5. Under No partition, from the Interface type list, select the type of interface:
    • t1
    • e1
  6. From the Scheduler type list, select Per unit scheduler.
  1. Enter

    set clocking internal

  2. Add a description:
    • For T1 interfaces, enter set description clear t1 interface.
    • For E1 interfaces, enter set description clear e1 interface.
  3. Enter

    set hold-time down 500 up 500

  4. Specify a clear channel:
    • For T1 interfaces, enter set no--partition interface-type t1.
    • For E1 interfaces, enter set no--partition interface-type e1.
  5. Enter

    set per-unit-scheduler

Configure T1 or E1 options:

  • Bit error rate test (BERT) algorithm—for example, all ones repeating.
  • BERT error rate, a value from 0 through 7—for example, 5.
  • BERT period, in seconds, a value from 1 through 240—for example, 5.
  • (T1 interfaces only) Line buildout, in feet for cables 655 ft (200 m) or shorter—for example, 0-132—or in decibels for longer cables.
  • Framing mode:
    • For T1 interfaces, either superframe or extended superframe (ESF)—for example, ESF
    • For E1 interfaces, G704, G704 without cyclic redundancy check 4 (CRC4), or G703 unframed—for example, G704.
  • (T1 interfaces only) Line encoding method—for example, alternate mark inversion (AMI).
  • Loopback mode—for example, local.
  1. Next to T1 options or E1 options, click Configure.
  2. From the Bert algorithm list, select all-ones-repeating.
  3. In the Bert error rate box, type 5.
  4. In the Bert period box, type 5.
  5. For T1 interfaces only, from the Buildout list, select 0-132.
  6. From the Framing list:
    • For T1 interfaces, select esf.
    • For E1 interfaces, select g704.
  7. For T1 interfaces only, from the Line encoding list, select ami
  8. From the Loopback list, select local.
  9. Click OK
  1. Enter

    set bert-algorithm all-ones-repeating

  2. Enter

    set bert-error-rate 5

  3. Enter

    set bert-period 5

  4. For T1 interfaces only, enter

    set buildout 0-132

  5. Set the framing mode:
    • For T1 interfaces, enter set framing esf.
    • For E1 interfaces, enter set framing g704.
  6. For T1 interfaces only, enter

    set line encoding ami

  7. Enter

    set loopback local

Configure trace options.
  1. Next to Traceoptions, select the check box and click Configure.
  2. Next to Flag, click Add new entry.
  3. From the Flag name list, select all.
  4. Click OK until you return to the Interface page.

Enter

set traceoptions flag all

Configure advanced options.

For example, apply configuration settings from one or more groups except the test group.

  1. Next to Advanced, click the expand (+) icon.
  2. Next to Apply groups except, click Add new entry.
  3. In the Value box, type test.
  4. Click OK.

Enter

set interfaces apply-groups test

Configuring Channelized T1/E1/ISDN PRI Interface to Drop and Insert Time Slots

On channelized T1/E1/ISDN PRI interfaces configured for channelized operation, you can insert channels (time slots) from one port (for example, channels carrying voice) directly into the other port on the PIM, to replace channels coming through the Routing Engine. Although you need not use the same time slots on both interfaces, the time slots count must be the same. The channels that are not configured for the drop-and-insert feature are used for normal traffic.

You must ensure that the signaling channels (port 16 for an E1 interface and port 24 for a T1 interface) are also part of the channels that are being switched through the drop-and-insert functionality. The JUNOS software does not support switching of voice and data between ports by default.

Both ports involved in the drop-and-insert configuration must use the same clock source—either the device's internal clock or an external clock. The following clock source settings are valid:

For more details about valid clock combinations, see Frequently Asked Questions About Channelized T1/E1/ISDN PRI Interfaces.

To configure or edit the drop-and-insert feature on a channelized T1/E1/ISDN PRI interface:

  1. Navigate to the top of the configuration hierarchy in either the J-Web or CLI configuration editor.
  2. Perform the configuration tasks described in Table 51.
  3. If you are finished configuring the device, commit the configuration.
  4. To verify the configuration, see Verifying Interface Configuration.

Table 51: Configuring a Channelized T1/E1/ISDN PRI Interface to Drop and Insert Time Slots

Task

J-Web Configuration Editor

CLI Configuration Editor

Navigate to the Interfaces level in the configuration hierarchy.

For information about interface names, see Network Interface Naming.

  1. In the J-Web interface, select Configuration>Edit Configuration>View and Edit.
  2. Next to Interfaces, click Edit.

From the [edit] hierarchy level, enter

edit interfaces ct1-3/0/0

Create a new interface—for example, ct1-3/0/0.

  1. Next to Interfaces, click Add new entry.
  2. In the Interface name box, type ct1–3/0/0.
  3. Click OK.

Configure the clock source and partition on ct1-3/0/0.

Note: While configuring the drop-and-insert feature, you must ensure that both ports on the channelized T1/E1 PIM run on the same clock.

For more details about valid clock combinations, see Frequently Asked Questions About Channelized T1/E1/ISDN PRI Interfaces.

  1. In the Interface name column, click ct1–3/0/0.
  2. On the Interfaces page, next to Clocking, select the check box and click Configure.
  3. From the Clocking choices list, select external.
  4. Click OK.
  5. On the Interfaces page, next to Partition, click Add new entry.
  6. On the Interface Partition page, type 1 in the Partition number box.
  7. From the Interface type list, Select ds.
  8. In the Timeslots box, type 1-10.
  9. Click OK twice.

From the [edit] hierarchy level, enter

set interfaces ct1-3/0/0 clocking external

set interfaces ct1-3/0/0 partition 1 timeslots 1-10

set interfaces ct1-3/0/0 partition 1 interface-type ds

Create a new interface—for example, ct1-3/0/1.

  1. On the Interfaces Configuration page, next to Interface, click Add new entry.
  2. In the Interface name box, type ct1-3/0/1.
  3. Click OK.

From the [edit] hierarchy level, enter

edit interfaces ct1-3/0/1

Configure the clock source and partition on ct1-3/0/1.

Note: While configuring the drop-and-insert feature, you must ensure that both ports on the channelized T1/E1 PIM run on the same clock.

For more details about valid clock combinations, see Frequently Asked Questions About Channelized T1/E1/ISDN PRI Interfaces.

  1. On the Interfaces Configuration page, click ct1-3/0/1 in the Interface name column.
  2. Next to Clocking, select the Yes check box, and click Configure.
  3. From the Clocking choices list, select external.
  4. Next to External, click Configure.
  5. In the Interface box, type ct1-3/0/0.
  6. Click OK twice.
  7. On the Interfaces page, next to Partition, click Add new entry.
  8. On the Interface Partition page, type 1 in the Partition number box.
  9. From the Interface type list, Select ds.
  10. In the Timeslots box, type 1-10.
  11. Click OK twice

From the [edit] hierarchy level, enter

set interfaces ct1-3/0/1 clocking external interface ct1-3/0/0

set interfaces ct1-3/0/1 partition 1 timeslots 1-10

set interfaces ct1-3/0/1 partition 1 interface-type ds

Create new interfaces—for example, ds-3/0/0:1, ds-3/0/1:1 and configure drop-and-insert feature.

Note: Both interfaces configured for the drop-and-insert feature must exist on the same PIM. For example, you can configure ds-3/0/0:1 as the data input interface for ds-3/0/1:1, but not for ds-4/0/0:1.

  1. On the Interfaces Configuration page, next to Interface, click Add new entry.
  2. In the Interface name box, type ds–3/0/0:1.
  3. Click OK.
  4. On the Interfaces Configuration page, click ds–3/0/0:1 in the Interface name column.
  5. Next to Data input, click Configure.
  6. From the Input choice list, select interface.
  7. In the Interface box, type ds-3/0/1:1.
  8. Click OK.

From the [edit] hierarchy level, enter

edit interfaces ds-3/0/0:1

Enter

set interfaces ds-3/0/0:1 data-input interface ds-3/0/1:1

Configuring Channelized T1/E1/ISDN PRI Interfaces for ISDN PRI Operation

On a J-series device with Dual-Port Channelized T1/E1/ISDN PRI PIMs, you can configure each port for either T1, E1, or ISDN PRI service, or for a combination of ISDN PRI and either channelized T1 or E1 service. For a channelized T1 interface with ISDN PRI service, you can configure 23 B-channels and for a channelized E1 interface with ISDN PRI service, you can configure 30 B-channels.

You must also explicitly configure a D-channel: time slot 24 on a channelized T1 interface and time slot 16 on a channelized E1 interface. In addition, you select a switch type and trace options.

Setting up the J-series device for ISDN PRI operation is a multipart process. First, you add ISDN PRI service on a channelized interface as shown here. Second, you follow the instructions in Configuring Dialer Interfaces (Required) to configure a dialer interface. You can then configure ISDN services such as dial-in, callback, and backup. For details, see Configuring ISDN.

To configure an ISDN PRI network service on a channelized T1 or E1 interface for the J-series device:

  1. Navigate to the top of the configuration hierarchy in either the J-Web or CLI configuration editor.
  2. Perform the configuration tasks described in Table 52.
  3. Go on to Configuring Dialer Interfaces (Required).

Table 52: Adding an ISDN PRI Service to a Channelized T1/E1/ISDN PRI Interface

Task

J-Web Configuration Editor

CLI Configuration Editor

Navigate to the Interfaces level in the configuration hierarchy.

  1. In the J-Web interface, select Configuration>View and Edit>Edit Configuration.
  2. Next to Interfaces, click Edit.

From the [edit] hierarchy level, enter

edit interfaces ct1-2/0/0

Create a new interface—for example, ct1-2/0/0.

For information about interface names, see Network Interface Naming.

  1. Next to Interfaces, click Add new entry.
  2. In the Interface name box, type ct1–2/0/0.
  3. Click OK.

Configure the partition and interface type. For example, partition the interface into time slots 1 through 23 for B-channels and time slot 24 for the D-channel.

For a channelized T1 interface, you can configure 1 through 23 as B-channels and the 24th channel as the signaling channel (D-channel).

For a channelized E1 interface, you can configure 1 through 15 and 17 through 31 as B-channels and the 16th channel as the signaling channel (D-channel).

  1. In the Interface name column, click ct1–2/0/0.
  2. On the Interfaces page, next to Partition, click Add new entry.
  3. In the Partition number box, type 1–23.
  4. In the Timeslots box, type 1-23.
  5. From the Interface type list, Select bc.
  6. Click OK.
  7. On the Interfaces page, next to Partition, click Add new entry.
  8. In the Partition number box, type 24.
  9. In the Timeslots box, type 24.
  10. From the Interface type list, Select dc.
  11. Click OK.

From the [edit] hierarchy level, enter

set interfaces ct1-2/0/0 partition 1-23 timeslots 1-23

set interfaces ct1-2/0/0 partition 1-23 interface-type bc

set interfaces ct1-2/0/0 partition 24 timeslots 24

set interfaces ct1-2/0/0 partition 24 interface-type dc

Configure a trace options flag.
  1. Next to Traceoptions, select the check box and click Configure.
  2. Next to Flag, click Add new entry.
  3. From the Flag name list, select q921.
  4. Click OK until you return to the Interface page.

From the [edit] hierarchy level, enter

set interfaces ct1-2/0/0 traceoptions flag q921

Configure B-channel allocation order for allocating a free B-channel for dial-out calls. You can allocate from the lowest-numbered or highest-numbered time slot. The default value is descending.

  1. On the Interfaces page, next to Isdn options, click Configure.
  2. From the Bchannel allocation list, select ascending.
  3. Click OK.

To set the ISDN options, from the [edit] hierarchy level, enter

set interfaces ct1-2/0/0 isdn-options bchannel-allocation ascending

Select the type of ISDN switch—for example, NI2. The following switches are compatible with J-series devices:

  • ATT5E—AT&T 5ESS
  • ETSI—NET3 for the UK and Europe
  • NI2—National ISDN-2
  • NTDMS-100—Northern Telecom DMS-100
  • NTT—NTT Group switch for Japan

From the Switch type list, select ni2.

From the [edit] hierarchy level, enter

set interfaces ct1-2/0/0 isdn-options switch-type ni2

Configure Q.931 timers. Q.931 is a Layer 3 protocol for the setup and termination of connections. The default value for each timer is 10 seconds, but can be configured between 1 and 65536 seconds—for example, 15.

  1. In the T310 box, type 15.
  2. Click OK.

From the [edit] hierarchy level, enter

set isdn-options t310 15

Configure dialer options.

  • Name the dialer pool—for example, ISDN-dialer-group.
  • Set the dialer pool priority—for example, 1.

Dialer pool priority has a range from 1 to 255, with 1 designating lowest-priority interfaces and 255 designating the highest-priority interfaces.

  1. On the Interfaces page, next to Dialer options, select Yes and then click configure.
  2. Next to Pool, click Add new entry.
  3. In the Pool identifier box, type isdn-dialer-group.
  4. In the Priority box, type 1.
  5. Click OK.

From the [edit interfaces ct1-2/0/0] hierarchy level, enter

set dialer-options pool isdn-dialer-group priority 1

To configure a dialer interface, see Configuring Dialer Interfaces (Required).

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