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Resumen del manual
PRACTICES D4-OCU DP (ETR) ALL-RATE OFFICE CHANNEL UNIT DATAPORT WITH EXTENDED TRANSMIT RANGE INSTALLATION/MAINTENANCE CONTENTS 1. GENERAL ...................................................................1 2. INSTALLATION...........................................................2 3. CONNECTIONS..........................................................3 4. TESTING.....................................................................3 5. AUTO LOOP DISCONNECT ......................................4 6. MAINTENANCE ..........................................................4 7. WARRANTY AND CUSTOMER SERVICE ................4 FIGURES Figure 1. ADTRAN D4-OCU DP.........................................1 Figure 2. Rate Option Switch .............................................2 Figure 3. SW1.....................................................................3 Figure 4. Connector Pin Assignments ...............................4 TABLES Table A. SW1 Option Settings ...........................................3 1. GENERAL This practice has been reissued to correct enhanced Switch 56 references. This practice is an installation and maintenance guide for the ADTRAN Office Channel Unit Dataport (D4-OCU DP) with Extended Transmit Range1 (ETR). Figure 1 is an illustration of the unit. A detailed product description is found in ADTRAN D4-OCU DP Description Practice, Section 61107005L2-2. The Office Channel Unit Dataport (OCU DP) allows access to the Dataphone® Digital Service (DDS) or Basic Digital Service using existing 4-wire metallic facilities and D4 channel banks equipped for dataport operation. In addition to this interchangeability, the ADTRAN D4-OCU DP contains the following enhancements: • Extended loop range2 (45 dB receiver range when operated at all rates) • Intermediate rate of 19.2 kbps; special format3 1 Covered under I.N.C. patent number 4,887,278 Dataphone is a registered trademark of AT&T 2 Covered under ADTRAN patent number 4,759,035 3 Covered under I.N.C. Patent No. 4,862,480 Figure 1. ADTRAN D4-OCU DP • Switched 56 capability • Latching and normal loopbacks • Latching loopback capability in SW56 mode • Loss of sealing current disconnect • Poor loop signal quality disconnect • Hardware signaling selection • 45 dB range at all rates • Faceplate Bantam jacks • Four diagnostic faceplate indicators • Extended transmit range Furnished with common equipment and individual channel units, the D4 channel bank is a digital terminal providing multiple-channel access to T carrier lines. The dataport is a D4-type channel unit which allows direct digital access to a T carrier time slot, avoiding the normal analog-to-digital conversion required in a voice channel unit. 61107.005L2-5C Section 61107005L2-5, Issue 3 In the DDS system, an OCU DP located at an end office interfaces the customer to the T carrier system. A 4-wire loop is terminated at the customer premises by a data service unit (DSU) or a channel service unit (CSU). It can be used in the hub office, intermediate office, end office, or SLC® terminal to extend the DDS network to that office which has previously served voice channels exclusively. The ADTRAN All-Rate Extended Range D4-OCU DP is interchangeable with the following AT&T units: • Subrate OCU DP (J98726DB) • 56 kbps OCU DP (J98726DE) • All Rate OCU DP (J98726DJ) The unit is also interchangeable with all previous and current ADTRAN units including the following: • All-Rate OCU DP (1102005A) • All-Rate with 38.4/64 kbps OCU DP (1102006A) • All-Rate OCU DP (1104005L9) 2. INSTALLATION After unpacking the unit, immediately inspect it for possible shipping damage. If damage is discovered, file a claim immediately with the carrier and contact ADTRAN Customer Service (see subsection 7). The D4-OCU DP plugs directly into a WECO®, or equivalent, D4 channel bank, ADTRAN General Purpose Communication (GPC) shelves, or ADTRAN ACT-1241 channel bank. No installation wiring is required. A sixteen-position rotary switch on the faceplate and an internal ten-position slide switch (SW1) must be set prior to installing the unit. Sixteen-Position Rotary Faceplate Switch The settings for the sixteen-position rotary switch select loop rates of 2.4, 4.8, 9.6,19.2, 38.4, 56, SW56, or 64 kbps, and Secondary Channel (SC). Set the switch functions as illustrated in Figure 2. When 64 kbps is selected, normal loopbacks are automatically disabled. Only latching loopback may be used atthis rate. When SW56 is selected as the operating rate, SW1-1 must remain off. SLC is a registered trademark of AT&T WECO is a registered trademark of AT&T Internal Switch Option Settings The location of the ten-position slide switch is illustrated in Figure 3. The option settings are provided in Table B. SW1 is a ten-position slide switch which enables or disables error correction, bank type, zero code suppression, latching loopback, hardware A/B signaling, quality monitoring, and extended transmit range. If more than one bank type is selected (on), th...