Administering DS1 parameters

Last Updated : Jul 20, 2020 |

Procedure

  1. Enter ds1 <slot-address>, where <slot-address> is any permitted port.

    The command line prompt changes to super-sls/ds1-<port-address>. If you want to remove the ds1 trunk from the SLS administration, enter exit to leave the second-level ds1 context and return to the (super-sls)# context, and then enter clear ds1 slot-address.

    Note:

    If configuration changes affecting trunk provisioning (such as, signaling and bit-rate) are made to a DS1 trunk where the trunk and its associated signaling group have already been provisioned, an error message instructs you that the Administrative change is in violation with existing trunk member provisioning, and the configuration change is rejected.

  2. Enter set name <name> to identify the user name for the DS1 trunk.

    Use the 1 to 27 character name as specified on CM (add trunk-group n). Type the name string inside double quotes.

  3. Enter set bit-rate <rate> to set the maximum transmission rate in Mbps for the DS1 facility.

    The rate can be either 1544 (T1) or 2048 (E1).

  4. Enter set signaling-mode <mode-type> to set the signaling mode for the DS1 facility, where <mode-type> is one of the following values:

    • cas. Out-of-band signaling for E1 service, yielding thirty 64 kbps B-channels for voice transmission

    • robbed bit. In-band signaling for T1 service, yielding twenty-four 56 kbps B-channels for voice transmission

    • isdnpri. T1 or E1 ISDN Primary Rate service (supports both FAS and NFAS)

    • isdnext. NFAS T1 or E1 ISDN service for:

      • T1 facility, in which all 24 channels are for bearer transport

      • E1 facility, in which all 31 channels are for bearer transport

  5. Enter set channel-numbering <method> to select the channel-numbering method for B-channels on an E1 interface, where <method> is one of the following values:

    • seq. Sequential codes of B-channels 1-30 in the ISDN Channel Identification IE

    • tslot. Timeslot method

  6. Enter set connect <far-end> to specify the equipment at the far-end of the DS1 link, where <far-end> is one of the following values:

    • host. Data application (computer or server)

    • lineside. Terminal equipment (video multiplexer)

    • network. Central office

    • pbx. Private communication system (another pbx)

  7. If the far-end equipment is specified as pbx (set in Step 6), enter set interface <glare-mode> to specify the glare-handling convention, where <glare-mode> can be one of the following values:
    Option Description

    For non-QSIG calls:

    For QSIG calls:

    • network. If the Branch Gateway is connected to a host computer and encounters glare, it overrides the far-end

    • user. If the Branch Gateway is connected to a public network and encounters glare, it releases the circuit

    • peerMaster. SLS overrides the other end when glare occurs

    • peerSlave. SLS releases the circuit when glare occurs
  8. If the DS1 link is employed with ISDN, and the glare-handling convention is specified as peerMaster or peerSlave for the ISDN link (set in Step 7).
  9. Enter set side <side> to specify the glare mode: either a or b.
  10. If the DS1 link is employed with ISDN, enter set country-protocol <country-code> to specify the ISDN Layer 3 country protocol type, where <country-code> is one of the values in ISDN Layer 3 country codes:
  11. For countries whose public networks allow for multiple ISDN Layer 3 country protocols for ISDN Primary Rate service, enter set protocol-version <option> to specify the mode.

    Verify that the protocol version matches the country specified in set country-protocol (set in Step 9).

  12. If the DS1 link is employed with ISDN, enter set bearer-capability <bearer> to set the Information Transfer Rate field of the Bearer Capability IE, where <bearer> is one of the following values:

    • 3khz. 3.1 kHz audio encoding

    • speech. Speech encoding

  13. Enter set interface-companding <type> to set the interface to agree with the companding method used by the far-end of the DS1 circuit for SLS mode, where <type> is one of the following values:

    • alaw. A-law companding

    • ulaw. U-law companding

  14. Enter set long-timer yes | no to increase the duration of the T303 (call establishment) timer, where:

    • yes. The T303 timer is extended from 4 seconds to 13 seconds

    • no. The T303 timer remains at 4 seconds

  15. Enter show to check the DS1 administration.

    The report lists the DS1 parameters. For example:

      Name = ‘Willow Steet 2’
DS1  Rate Signaling Channel Connect Interface Side Protocol Ver Bearer Cmpd Ltm   
---- ---- --------- ------- ------- --------- ---- -------- --- ------ ---- ---
  v3 1544   isdnpri     seq network      user    a country1   a speech ulaw  no
  16. Enter exit to leave the ds1 context in SLS.
Related information
ISDN Layer 3 country protocols for ISDN Primary Rate service