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Lucent Technologies DEFINITY Enterprise Communications Server Release 6 Instructions Manual
Lucent Technologies DEFINITY Enterprise Communications Server Release 6 Instructions Manual
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DEFINITY Enterprise Communications Server Release 6 Maintenance for R6r Volumes 1 & 2 555-230-126 Issue 2 January 1998 Additional Maintenance Procedures Page 6-15 DS1 CPE Loopback Jack (T1 Only) 6 A problem can exist in 1 or more of the 3 sections. The field technician is responsible for finding and correcting problems in the first 2 sections. The DS1 service provider is responsible for finding and correcting problems in the third section. Testing is divided into 3 steps. nTest customer premises wiring (section 1 in the following 3 figures) from the ICSU to the loopback jack as described in “DS1 Span Test.” nTest the CO-to-network interface wiring (section 3 in Figure 6-1) using the Smart Jack loopback (CO responsibility). Coordinate this test with the DS1 provider. nTest the short length of customer premises wiring (section 2 in the following 3 figures) between the loopback jack and the Smart Jack. This can be done using a loopback that “overlaps” section 2 of the cable. Any of the following loopbacks can do this: a. The local ICSUs line loopback, which is typically activated, tested, and then deactivated by the DS1 service provider at the CO end. b. The local DS1 interface’s payload loopback, activated and tested by the DS1 service provider at the CO end. c. The far-end ICSU’s line loopback. This test is activated at the management terminal by entering test ds1-loop far-csu-loopback-test-begin. The test is terminated by entering test ds1-loop end-loopback/span-test. Bit error counts are examined as described in “DS1 Span Test.” This test method is the least preferable because it covers wiring that is not in the local portion of the span. This test only isolates problems to section 2 wiring if there are no problems in the wiring between the far-end CO and the far-end ICSU. Coordinate this test with the DS1 service provider. If any of the above tests (a, b, or c) fail, a problem is indicated in section 2 as long as the tests for section 1 and section 3 pass. Since section 2 includes the network interface point, it is necessary to work with the service provider to isolate the fault to the loopback jack cable, the “dumb” block, or the Smart Jack.
DEFINITY Enterprise Communications Server Release 6 Maintenance for R6r Volumes 1 & 2 555-230-126 Issue 2 January 1998 Additional Maintenance Procedures Page 6-16 DS1 CPE Loopback Jack (T1 Only) 6 Figure 6-1. Network Interface at Smart Jack Figure Notes: 1. Span Section 1 2. Span Section 2 3. Span Section 3 4. 120A2 (or later) Integrated Channel Service Unit (ICSU)5. RJ-48 to Network Interface (Up to 1000 Feet) (305 m) 6. Loopback Jack 7. Network Interface Smart Jack 8. Interface Termination or Fiber MUX 9. Central Office
DEFINITY Enterprise Communications Server Release 6 Maintenance for R6r Volumes 1 & 2 555-230-126 Issue 2 January 1998 Additional Maintenance Procedures Page 6-17 DS1 CPE Loopback Jack (T1 Only) 6 Figure 6-2. Network Interface at Extended Demarcation Point (Smart Jack Inaccessible) Figure Notes: 1. Span Section 1 2. Span Section 2 3. Span Section 3 4. 120A2 (or later) Integrated Channel Service Unit (ICSU) 5. RJ-48 to Network Interface (Up to 1000 Feet) (305 m)6. Loopback Jack 7.“Dumb” Block (Extended Demarcation) 8. Network Interface Smart Jack 9. Interface Termination or Fiber MUX 10. Central Office
DEFINITY Enterprise Communications Server Release 6 Maintenance for R6r Volumes 1 & 2 555-230-126 Issue 2 January 1998 Additional Maintenance Procedures Page 6-18 DS1 CPE Loopback Jack (T1 Only) 6 Figure 6-3. Network Interface at Extended Demarcation Point (Smart Jack Accessible) Figure Notes: 1. Span Section 1 2. Span Section 2 3. Span Section 3 4. 120A2 (or later) Integrated Channel Service Unit (ICSU) 5. RJ-48 to Network Interface (Up to 1000 Feet) (305 m)6.“Dumb” Block (Extended Demarcation) 7. Loopback Jack 8. Network Interface Smart Jack 9. Interface Termination or Fiber MUX 10. Central Office 11. “Dumb” Block to Smart Jack RJ-48
DEFINITY Enterprise Communications Server Release 6 Maintenance for R6r Volumes 1 & 2 555-230-126 Issue 2 January 1998 Additional Maintenance Procedures Page 6-19 DS1 CPE Loopback Jack (T1 Only) 6 Configurations Without a Smart Jack When the loopback jack is added to a span that does not contain a Smart Jack, the span is divided into 2 sections. See Figure 6-4 and Figure 6-5. 1. ICSU to the loopback jack. 2. Loopback jack to the Central Office (CO). Figure 6-4.Network Interface at “Dumb” Block Figure Notes: 1. Span Section 1 2. Span Section 2 3. 120A2 (or later) Integrated Channel Service Unit (ICSU) 4. RJ-48 to Network Interface (Up to 1000 Feet) (305 m)5. Loopback Jack 6.“Dumb” Block (Demarcation Point) 7. Interface Termination or Fiber MUX 8. Central Office
DEFINITY Enterprise Communications Server Release 6 Maintenance for R6r Volumes 1 & 2 555-230-126 Issue 2 January 1998 Additional Maintenance Procedures Page 6-20 DS1 CPE Loopback Jack (T1 Only) 6 Figure 6-5.Network Interface at “Dumb” Block with Repeater Line to Fiber MUX Section 2 includes the short cable from the loopback jack to the “dumb” block demarcation point (part of the loopback jack). This is the only portion o f section 2 that is part of customer premises wiring but is not covered in the loopback jack’s loopback path. Figure Notes: 1. Span Section 1 2. Span Section 2 3. 120A2 (or later) Integrated Channel Service Unit (ICSU) 4. RJ-48 to Network Interface (Up to 1000 Feet) (305 m)5. Loopback Jack 6. “Dumb” Block (Demarcation Point) 7. Repeater 8. Fiber MUX 9. Central Office
DEFINITY Enterprise Communications Server Release 6 Maintenance for R6r Volumes 1 & 2 555-230-126 Issue 2 January 1998 Additional Maintenance Procedures Page 6-21 DS1 CPE Loopback Jack (T1 Only) 6 A problem can exist in 1 or both of the 2 sections. The field technician is responsible for finding and correcting problems in section 1 and the loopback cable portion of section 2. The DS1 service provider is responsible for finding and correcting problems in the majority of section 2. Testing is divided into 2 steps. 1. Test customer premises wiring (section 1 in Figure 6-4 ) from the ICSU to the loopback jack as described in the “DS1 Span Test” section. 2. Test the loopback jack-to-”dumb” block and ”dumb” block-to-CO wiring (section 2 in Figure 6-4 ). This can be done using a loopback that “overlaps” the section of the span. Any of the following loopbacks can do this: a. The local ICSUs line loopback, which is typically activated, tested, and then deactivated by the DS1 service provider at the CO end. b. The local DS1 interface’s payload loopback, activated and tested by the DS1 service provider at the CO end. c. The far-end ICSU’s line loopback. This test is activated at the management terminal by entering test ds1-loop far-csu-loopback-test-begin. The test is terminated by entering test ds1-loop end-loopback/span-test. Bit error counts are examined as described in the “DS1 Span Test” section. This test only isolates problems to section 2 wiring if there are no problems in the wiring between the far-end CO and the far-end ICSU. Coordinate this test with the DS1 service provider. If any of the above tests (a, b, or c) fail, a problem is indicated in section 2. This could mean bad loopback jack -to-”dumb” block cabling, but is more likely to indicate a problem somewhere between the “dumb” block and the CO. This is the responsibility of the DS1 service provider. If the DS1 Span Test confirms that there are no problems in section 1, the technician should proceed as follows to avoid unnecessary dispatch. nIdentify and contact the DS1 service provider nInform the DS1 provider that loopback tests of the CPE wiring to the “dumb” block (section 1) showed no problems nIf the far-end ICSU line loopback test failed, inform the DS1 provider nRequest that the DS1 provider perform a loopback test of their portion of the section 2 wiring by sending someone out to loop section 2 back to the CO at the “dumb” block. If this test fails, the problem is in the service provider’s wiring. If the test passes, the problem is in the cable between the loopback jack and the “dumb” block. Replace the loopback jack.
DEFINITY Enterprise Communications Server Release 6 Maintenance for R6r Volumes 1 & 2 555-230-126 Issue 2 January 1998 Additional Maintenance Procedures Page 6-22 DS1 CPE Loopback Jack (T1 Only) 6 Configurations Using Fiber Multiplexers Use the loopback jack when customer premises DS1 wiring connects to an on-site fiber multiplexer (MUX) and allows wiring to the network interface point on the MUX to be remotely tested. This requires that ICSUs be used on DS1 wiring to the MUX. Fiber MUXes can take the place of Interface termination feeds as shown in Figure 6-1 , Figure 6-2, Figure 6-3, and Figure 6-4. Test these spans using the same procedures as metallic spans. Note the following points: 1. Fiber MUXes may have loopback capabilities that can be activated by the service provider from the CO end. These may loop the signal back to the CO or back to the DS1 board. If the MUX provides the equivalent of a line loopback on the “problem” DS1 facility, this may be activated following a successful loopback jack test and used to isolate problems to the wiring between the loopback jack and the MUX. 2. Be aware that there are installations that use repeatered metallic lines between the MUX and the “dumb” block. These lines require DC power for the repeaters and this DC power is present at the “dumb” block interface to the CPE equipment. A loopback jack is required in this configuration to properly isolate and terminate the DC power . To check for the presence of DC, make the following 4 measurements at the network interface jack: 1. From Transmit Tip (T, Pin 5) to Receive Tip (T1, Pin 2) 2. From Transmit Ring (R, Pin 4) to Receive Ring (R1, Pin 4) 3. From Transmit Tip (T, Pin 5) to Transmit Ring (R, Pin 4) 4. From Receive Tip (T1, Pin 2) to Receive Ring (R1, Pin 4) All measurements should read 0 (zero) volts DC. For pin numbers and pin designations, refer to Integrated Channel Service Unit (ICSU) Installation and Operation , 555-230-193. Operating Charasteristics If a TN464F or TN767E and a 120A2 were installed in a system running pre-G3V3 software and the software is later upgraded to G3V3 Release 3 or later, reseat the DS1 circuit pack so that the ICSU administration fields will appear on the DS1 administration form.
DEFINITY Enterprise Communications Server Release 6 Maintenance for R6r Volumes 1 & 2 555-230-126 Issue 2 January 1998 Additional Maintenance Procedures Page 6-23 Facility Test Calls 6 Facility Test Calls The Facility Test Calls feature allows you to use a voice terminal to make test calls to specific trunks, time slots, tones, and tone receivers within the system. The test call verifies that the accessed component is functioning properly. To use this feature, it must be enabled on the Class of Restriction form, and you must know the Facility Test Call Access Code. The code can be retrieved by entering display feature-access-codes. It appears on page one of the screen output. NOTE: For the ISDN-PRI Test Call feature see ‘‘Troubleshooting ISDN-PRI Test Call Problems’’ in Chapter 5, ‘‘Responding to Alarms and Errors’’. NOTE: The following test call descriptions are for voice terminal users: Trunk Test Call The trunk test call accesses specific Tie or CO trunks, including DS1 trunks. If the trunk is busied out by maintenance, it will be temporarily released for the test call and returned to busyout afterwards. Before making the test call, use list configuration to determine the location of the trunk ports that you which to test. DID trunks cannot be accessed. To place a trunk test call: 1. Dial the FAC described above and listen for dial tone. 2. Dial the 7-digit port location UUCSSpp: UU= Cabinet number (01 for PPN, 02 -- 44 for EPNs) C = Carrier number (A=1, B=2, C=3, D=4, E=5) SS = Slot number (01--20) pp = Port circuit number (01--24) The channels on a DS1 trunk are addressed by using the channel number for the port number. 3. Listen for one of the following tones: Dial tone or Silence The trunk is connected. Go to step 4. Busy Tone The trunk is either busy processing a call or is out of service. Check status trunk.
DEFINITY Enterprise Communications Server Release 6 Maintenance for R6r Volumes 1 & 2 555-230-126 Issue 2 January 1998 Additional Maintenance Procedures Page 6-24 Facility Test Calls 6 4. Place a call. If the call does not go through (no ringing is heard) check to see if the circuit has been removed or if the trunk is a rotary trunk. The dial tone heard is coming from the far-end. If the far end has been disabled, you will not hear dial tone. However, depending on far-end administration, you may still be able to dial digits. All digits dialed after the port number are transmitted using end-to-end DTMF signaling. If the trunk being tested is a rotary trunk, it is not possible to break dial tone. DSO Loop-Around Test Call The DS0 Loop Around feature provides a loop around connection for incoming Non-ISDN DS1 trunk data calls. This feature is similar to the far end loop around connection provided for the ISDN Test Call feature. This DS0 loop around is provided primarily to allow a network service provider to perform facility testing at the DS0 level before video teleconferencing terminals are installed at the PBX. The feature is activated on a call-by-call basis by dialing a test call extension specified on the second page of the System Parameters Maintenance form. No special hardware is required. When the test call extension is received by the PBX, a non inverting 64 kbps connection is set up on the PBXs Time Division Multiplexed bus. More than one loop around call can be active at the same time. For calls routed over the public network using the ACCUNET Switched Digital Service (SDS) or Software Defined Data Network (SDDN), the data transmission rate is 56 Kbps since robbed bit signaling is used. For calls established over a private network using common channel signaling, the full 64 kbps data rate is available. When the incoming trunk group is used only for data calls (SDS), the Communications Type on the associated Trunk Group form should be set to “data”. When the incoming trunk group is used for robbed bit alternate voice and/or data (SDN/SDDN), the Communications Type on the Trunk Group form should be set to “rbavd” (robbed bit alternate voice data). For private network trunks using common channel signaling, the Communications Type on the associated Trunk Group form can be set to “avd”.Reorder tone The trunk requested is in a different port network from your station, and inter-PN resources are not available to access it. Intercept Tone The port addressed is not a trunk, or it is a DID trunk, or the trunk is not administered. Confirmation Tone The port is a tone receiver. See the ‘‘ DTMR Test Call’’ section.