How to Simulate V5.2 Multi-links over E1 Interfaces

The V5.2 protocol specifies the capability to use from 1 to 16 E1 links. The management of the links is included in the standard: ETSI ETS300 347-1.

The purpose of this document is to provide information about the options supported by the Clarinet simulation.

E1 interfaces

The profile created by the wizard should have the following specifications:-
  • Interface Type=V5x.
  • Emulation mode=AN or LE.
  • V5 interface Type=V5.2

The Clarinet profile allows you to manage a V5.2 interface corresponding to a Clarinet group:-

  • Open the profile.
  • Select the 'Clarinet 1' tab.
  • Whilst holding down the Shift or Ctrl key, click on the Clarinet numbers (each of them corresponding to an E1 interface) in the Interface(s) list.
  • The tab indication 'Clarinet 1' is replaced by 'Multi-Clarinet'.

'Multi-clarinet' allows you to globally configure the group of E1 interfaces.

Configuration of the Links

Each E1 interface corresponds to a V5.2 link. The set of E1 links can be displayed and configured by accessing Interface Specs=>Link

=>Link ID A link ID is allocated to each of them.

=>Options CRC4 multi-frame is normally used over V5 (selected by default).

=>Interface Specs: to specify the E1 clock source...

Configuration of the C-channels

The set of C-channel is displayed and configured by accessing Interface Specs=>C-Channels:-

The number of physical C-channels is specified by entering the value in the field 'Number of physical C-Channels'.
Each of the Clarinet's E1 interfaces supports up to 2 physical C-channels. The maximum number allowed depends on the number of Clarinets selected to define the Multi-Clarinet set.

The panel is automatically updated (depending on the number of C-channels) to display the list of the physical C-channels as specified in the standard (all the TS 16s and then all the TS 15s).

The column, Physical, displays the strings Ci, TSj where Ci is the Clarinet number and TSj is the time slot number.

The column, Logical, displays the logical C-channels specified by the value ID=. If no value is specified, the C-channels display (standby) state. If a value is specified, it is in Activation state

The column, C-path, displays the C-paths allocated to the C-channels. Click Edit to define allocation of ISDN and PSTN C-paths.

V5.2 standard and Clarinet features

The V5.2 standard includes the following definitions:-

  • Primary Link: The 2048 kbit/s link in a multi-link V5.2 interface whose physical C-channel in TS 16 carries a C-path for the protection protocol, and on V5.2 initialisation, also the C-path for the control protocol, link control protocol, and the BCC protocol. Other C-paths may also be carried in the same TS 16.
  • Secondary Link: the 2048 kbit/s link in a multi-link V5.2 interface whose physical C-channel in TS 16 carries a C-path for the protection protocol, and on V5.2 initialisation, acts as the standby C-channel for the control protocol, link control protocol, and the BCC protocol.

The C-paths are allocated to the logical C-channel. The allocation of the C-path complies with the specifications of ETS300347-1 paragraph 18 and figure 25.

Resulting from application of the V5.2 standard are the definition of the following features for the Clarinet:-

  • Primary Link: The E1 interface of the first Clarinet defined in the 'Multi-Clarinet' set
    • .
  • Secondary Link: The E1 interface of the second Clarinet defined in the 'Multi-Clarinet' set.
  • Group 1: TS 16 of Primary + Secondary Links
    • .
  • Group 2: All other TSs.
  • Protection protocol: Carried in TS 16 of Primary Link and TS 16 of Secondary Link.
  • Control protocol, link control protocol, and the BCC protocol: Carried in TS 16 of the primary link at initialisation.
  • PSTN or ISDN C-paths: they can be initialised in any logical C-channel either in Group 1 or Group 2.

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