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AMENDMENT 1

By Loretta Porter,2014-07-11 16:25
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AMENDMENT 1 ...

    Telecommunication Engineering Centre

    Department of Telecommunications

No. TBS/DCC/2005-TEC Dated:29-7-2005

Subject: Amendment 1 to IR for “Interface Requirements of digital

    exchange with 2048 kbit/s Interface” (No. IR/PNI-05/01.JUL 2004)

1. Reason for the Amendment: Equipment manufacturers are now seeking

    Interface Approval from TEC for NGN based implementations consisting of

    Media Gateway, Signalling Gateway, Softswitch etc. There have been cases

    for Interface Approval of Remote Switching Equipment at Point of

    Interconnect (POI). Some of the manufacturers of these equipment do not

    support Indian R2. There are other issues arrising due to the separation of

    call control from media layer. This Amendment is intended to address these

    issues.

2. Amendment:

    S.No. Clause Existing Clause New Clause

    No.

    Interface Requirements of Title of Interface Requirements of a 1. Digital Exchange with IR Switching Node with Network-

    2048 kbit/s Interface Network Interface at 2048 kbit/s

     2. This document specifies the This document specifies the Interface 1.1 Interface Requirements (IR) of Requirements (IR) of a Switching a Digital Exchange, including Node such as digital exchange, Mobile

    Mobile Switching Centre Switching Centre (MSC), Remote

    (MSC), supporting 2048 kbit/s Switching Equipment (RSE), Media

    interface, for interconnection Gateway (with integrated or stand-

    with Public Switched alone Signalling Gateway), with a

    Telephone Network Network-Network interface at 2048

    (PSTN)/Public Land Mobile kbit/s, for interconnection with Public

    Network (PLMN). Switched Telephone Network

    (PSTN)/Public Land Mobile Network

    (PLMN).

     1.1 (a) 3. New Clause Interface towards packet based

    network, if any, is not applicable for

    interconnection between two licensed Amendment 1 to TEC IR No. IR/PNI-05/01 JUL 2004 1/6

    S.No. Clause Existing Clause New Clause

    No.

    service providers. Similarly interface

    between RSE and the main exchange

    is not applicable for interconnection

    between two licensed service

    providers.

     (i) Compliance to this IR does not 4. Compliance to this IR does not 1.2 guarantee any service to be offered by guarantee any service to be the switching node. Performance offered by the switch. related parameters such as call Performance related completion ratio, BHCA, charging, parameters such as call Quality of Service etc. also do not completion ratio, BHCA, form part of this IR. charging, Quality of Service (ii) In case of Media gateway or etc. also do not form part of Media gateway with signalling this IR. gateway, QoS parameters in this IR

    shall be applicable. (iii) Lawful

    interception is also not part of IR.

     5. Following will be mentioned Following will be mentioned on IAC: 1.3 on IAC: 1. “Remarks” column on the Interface

    Approval Certificate (IAC) shall Application : mention as below (as applicable):

    (i) Tested for CCS7. Not suitable for Wireless OR Wire-line POIs requiring Indian Modified

    R2 Signalling. Responsibility to

    provide Indian R2 Signalling

    arrangement, if situation so arises,

    lies with the user of the

    equipment. (ii) In case of Media Gateway:

    Deployment of Media Gateways

    controlled by a Media Gateway

    Controller (Softswitch/MSC

    server) is restricted to one Service

    area.

    In case of Remote Switching

    Equipment:

    Deployment of Remote Switching

    Equipment Controlled by a Main

    switch is restricted to one service

    area.

    (iii) Lawful Interception Capability as

    required by the provisions in the

    Amendment 1 to TEC IR No. IR/PNI-05/01 JUL 2004 2/6

    S.No. Clause Existing Clause New Clause

    No.

    License agreement is possible in

    the tested configuration as per

    undertaking given by the vendor,

    but not tested being not part of the

    Interface Approval Requirements.

    2. “Application” column on the IAC

    shall mention as below(as applicable) :

    i) Wireless OR Wireline

    applications.

    ii) Functionality related to Radio

    Control Functions, HLR, VLR

    etc. not tested.

    iii) In case of Media Gateway and

    Remote Switching Equipment:

     This is not a stand-alone

    equipment and works only in

    association with the equipment-

    ------ (product name and model

    No. of all associated equipment

    in the tested configuration ).

    iv) Packet Technology used:

    IP/ATM

    v) Codec, if approval.

     6. The digital exchange shall The Equipment Under Test (EUT) 2.1 have the capability to shall have the capability to

    interconnect with other interconnect with other switching

    exchanges/ networks using network elements at POI / networks

    2048 kbit/s digital interface as using 2048 kbit/s digital interface as

    per ITU-T Recommendations per ITU-T Recommendations Q.511

    Q.511 (Interface A), G.703, (Interface-A), G.703, G.704 and

    G.704 and G.706. G.706.

     7. New Title Interface towards Packet based 2.2 Network

     8. New Clause In case of Media Gateway with IP 2.2.1 interface, the equipment shall support

    any one or any combination of the

    following interfaces:

    (i) 2048 kbit/s interface as per

    ITU-T Recommendation G.703.

    Amendment 1 to TEC IR No. IR/PNI-05/01 JUL 2004 3/6

    S.No. Clause Existing Clause New Clause No.

    (ii) STM-1 optical interface (Short

    haul) shall be in accordance with

    Table 2 of ITU-T Recommendations

    G.957.

    (iii) 10/100 FE(Fast Ethernet)

    interface / GE(Gigabit Ethernet)

    interface as per IEEE.

     (iv) Any other Interface as per

    International Standards (e.g. ITU-T,

    ETSI, IETF etc.) to be indicated by the

    applicant.

     9. In case of Media Gateway with ATM 2.2.2 New Clause interface, the equipment shall support

    any one or any combination of the

    following:

    (i) 2048 kbit/s interface as per ITU-

    T recommendation G.703

    (ii) STM-1 G.957 as per ITU-T

    recommendation I.432, G.957 and

    G.707.

    (iii)Any other Interface as per

    International Standards (e.g. ITU-

    T, ETSI, IETF etc.), to be

    indicated by the applicant. 3.1.2 R2 Signalling 10. In case of Media Gateways and (iii) Remote Switching Equipment, R2

    signalling may not be supported. The

    same will be indicated on the IAC. 3.4 New Title Protocol for controlling Media 11. Gateway

     New Clause 12. In case of Media Gateway with IP 3.4.1 interface, any one or more of the

    following media gateway control

    protocols shall be supported.

    (i) H.248

    (ii) SIP

    (iii) MGCP

    Amendment 1 to TEC IR No. IR/PNI-05/01 JUL 2004 4/6

    S.No. Clause Existing Clause New Clause

    No.

    (iv) H.323

    (v) Any other (to be indicated by

    the applicant)

     13. New Clause In case of Media Gateway with ATM 3.4.2 interface, any one or more of the

    following signalling protocols shall

    be supported.

    (i) ATM Forum PNNI 1.0.

    (ii) ITU-T Rec H.248. (iii) Any other (to be indicated by

    the applicant)

    IP based Media Gateway shall 14. 3.5 New Clause support handling of DTMF as per

    IETF RFC 2833.

IP based Media Gateway shall 15. 3.6 New Clause support IP Version 4 as per IETF

    RFC No. 791; and shall be

    upgradeable to IP Version 6 as per

    IETF RFC No. 2460.

IP based Media Gateway shall 16. 3.7 New Clause support Transmission Control

    Protocol (TCP) as per IETF RF 793,

    and User Datagram Protocol (UDP)

    as per IETF RFC 768.

The QoS parameters, as below, shall 17. 3.8 New Clause be supported:

a) „R‟ value greater than equal to 80

    b) Jitter < 5ms

    c) Packet loss < 0.1%

     18. 7.0 Junction Testing The equipment shall detect

    availability of E1 (2048 kbit/s) The digital exchange shall

    Amendment 1 to TEC IR No. IR/PNI-05/01 JUL 2004 5/6

    S.No. Clause Existing Clause New Clause

    No.

    support the facility of junction interface based on Bit Error Ratio

    testing from its end as well as (BER) Testing and transmission

    the PSTN/ PLMN exchange alarm indications.

    end

     (R. R. Mittar)

     Director(SW), TEC

Amendment 1 to TEC IR No. IR/PNI-05/01 JUL 2004 6/6

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