Customer Name: Southern Light, LLC - AT&T Clec Online

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ATT 1 – RESALE/AT&T9-STATE
EXHIBIT B – OPTIONAL DAILY USAGE FILE
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Southern Light
1Q08 GENERIC INTERCONNECTION AGREEMENT – 03/10/08
6.2 ODUF Physical File Characteristics
6.2.1 ODUF will be distributed to Southern Light via Secure File Transfer Protocol (FTP). The ODUF
feed will be a variable block format. The data on the ODUF feed will be in a non-compacted EMI
format (one hundred seventy-five (175) byte format plus modules). It will be created on a daily
basis Monday through Friday except holidays. Details such as dataset name and delivery
schedule will be addressed during negotiations of the distribution medium. There will be a
maximum of one (1) dataset per workday per OCN. If AT&T determines the Secure FTP Mailbox is
nearing capacity levels, AT&T may move the customer to CONNECT:Direct file delivery.
6.2.2 If the customer is moved, CONNECT:Direct data circuits (private line or dial-up) will be required
between AT&T and Southern Light for the purpose of data transmission. Where a dedicated line is
required, Southern Light will be responsible for ordering the circuit, overseeing its installation and
coordinating the installation with AT&T. Southern Light will also be responsible for any charges
associated with this line. Equipment required on the AT&T end to attach the line to the mainframe
computer and to transmit messages successfully on an ongoing basis will be negotiated on an
individual case basis. Any costs incurred for such equipment will be Southern Light’s
responsibility. Where a dial-up facility is required, dial circuits will be installed in the AT&T data
center by AT&T and the associated charges assessed to Southern Light. Additionally, all message
toll charges associated with the use of the dial circuit by Southern Light will be the responsibility of
Southern Light. Associated equipment on the AT&T end, including a modem, will be negotiated on
an individual case basis between the Parties. All equipment, including modems and software, that
is required on Southern Light’s end for the purpose of data transmission will be the responsibility of
Southern Light.
6.2.3 If Southern Light utilizes FTP for data file transmission, purchase of the FTP software will be the
responsibility of Southern Light.
6.3 ODUF Packing Specifications
6.3.1 The data will be packed using ATIS EMI records. A pack will contain a minimum of one (1)
message record or a maximum of ninety-nine thousand nine hundred and ninety-nine (99,999)
message records plus a pack header record and a pack trailer record. One transmission can
contain a maximum of ninety-nine (99) packs and a minimum of one (1) pack.
6.3.2 The OCN, From RAO, and Invoice Number will control the invoice sequencing. The From RAO will
be used to identify to Southern Light which AT&T RAO is sending the message. AT&T and
Southern Light will use the invoice sequencing to control data exchange. AT&T will be notified of
sequence failures identified by Southern Light and resend the data as appropriate.
6.4 ODUF Pack Rejection
6.4.1 Southern Light will notify AT&T within one (1) business day of rejected packs (via the mutually
agreed medium). Packs could be rejected because of pack sequencing discrepancies or a critical
edit failure on the Pack Header or Pack Trailer records (e.g., out-of-balance condition on grand
totals, invalid data populated). Standard ATIS EMI error codes will be used. Southern Light will
not be required to return the actual rejected data to AT&T. Rejected packs will be corrected and
retransmitted to Southern Light by AT&T.
6.5 ODUF Control Data
6.5.1 Southern Light will send one confirmation record per pack that is received from AT&T. This
confirmation record will indicate Southern Light’s receipt of the pack and the acceptance or
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