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Pre-Install Questionnaire

    The purpose of the pre-install questionnaire is to make sure that the telco has given you all the information required by Sangoma's Technician to complete the install.

    Download the questionnaire template here

    A sample of a properly filled out questionnaire is:

     

    Client Sangoma
    ITU or ANSI ITU
    eth0 MAC 12:34:56:78:90:12
    SPC 5111

     

    Card # Port # Card Model Wanpipe# T1/E1 Cfg FTDM Span#

    Sig

    Channel

    Error

    Type

    LSSU

    Length

    		 SLC

    SSF

    mtp3/isup

    		 APC DPC

    CIC

    Base

    Audio

    Channel

    NADI

    clg/cld
    1 1 A104 1 E1/N/NCRC4 1 1 basic 1 0 nat/nat 1234 2111 1 2-31 3/3
    1 2 A104 2 E1/N/NCRC4 2 n/a n/a n/a n/a n/a n/a 2111 33 1-31 3/3
    1 3 A104 3 E1/N/NCRC4 3 n/a n/a n/a n/a n/a n/a 3111 1 1-31 3/3
    1 4 A104 4 not used                      
    2 1 A101 5 E1/N/CRC4 4 16 pcr 1 0 int/int 1111 1111 1001 2-15,17-31 4/4

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    Wanpipe #

    The Wanpipe # is unique number assigned to each port and is used to easily identify the port.

    The number will be used for the wanpipe configuration file (/etc/wanpipe/wanpipeX.conf) as well as for the interface name (wxg1).

    This value does not need to be filled in as it will be filled in my the installation technician.

    T1/E1 Cfg

    This section is used to briefly describe the settings needed for the physical layer/layer 1.

    The structure of the field is:    Line Media/Line Clocking/Line Framing

    Line Media values are: T1 or E1

    Line Clocking values are: N(ormal) or M(aster)

    Line Framing values are: ESF, D4, CRC4, and NCRC4 (aka double frame)

    FTDM Span #

    The FTDM span value is a virtual number assigned to every port and is used to uniquely identify the port in the SMG cli.

    This value does not need to be filled in as it will be filled in my the installation technician.

     

     

    Sig Channel

    This section indicates on which time slot on the specified port a signaling link will be.

    Most commonly a signaling link will be on time slot 1 or 16.

    The telco should provide you with this information.

    Error Type

    This section indicates the type of layer 2 (MTP2) error correction the signaling on this port will use.

    There are 2 types of Error Correction:  basic or pcr.

    The telco should provide you with this information but PCR error correction is always used on links that will be transmitted on satellite connections and BASIC for all other types of connections

    LSSU Length

    This section indicates the length of LSSU frames on the signaling link.

    The length of an LSSU frame is either 1 or 2.

    The telco should provide you with this information.

    SLC (Signaling Link Selection Code)

    This section indicates the SLC value for the signaling link on this port.

    The SLC is a value between 0-15 that unique identifies this signaling link.

    Normally your first link will use 0, the second link will use 1, the third link will use 2, etc

    The telco should provide you with this information.

    SSF mtp3/isup

    This section indicates what SSF (Sub-Service Field) values this signaling link will use for the MTP3 traffic and ISUP traffic.

    The possible values are: int (0), spare (1), nat (2), res (3).

    Normally the value for MTP3 and ISUP layers will be the same but they can also be different.

    The telco should provide you with this information.

    APC

    This section indicates the APC (Adjacent Point Code) for the signaling link on this port. 

    The APC is the point code of the system on the other end of the signaling link.

    The telco should provide you with this information.

    DPC

    This section indicates the DPC (Destination Point Code) for the CICs on this port.

    The DPC is the point code of the SSP that the CICs are connected to.

    The telco should provide you with this information.

    CIC Base

    This section indicates the CIC base value for the CICs on this port.

    The CIC base is the CIC value for the first channel on this port.

    The telco should provide you with this information.

    Audio Channels

    This section indicates which time slots/channels on this port will be used to carry voice traffic.

    It is not un-common for channel 16 on ITU installs to not carry voice traffic and not carry signaling traffic.

    The telco should provide you with this information.

    NADI clg/cld

    This section indicates what value of NADI (Nature of address indicator) will be used for calling and called numbers.

    The telco uses this information to route the call as either a national or international number as ISUP does not allow you to use "+" in the called number string.

    If not all calls will use the same value leave this field blank and your technician will enable per call control of these values.

    Commonly used values are: national (3) or international (4).

    More information on this option can be found here.

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