User's Manual

Prepare to Leave the Site68P09258A31–A

Oct 2003

1X SCt 4812T BTS Optimization/ATP

5-7

Table 5-5: Set BTS Span Parameter Configuration

Step Action

3 If required only, enter the following MMI command for each span line to set the BTS span parameters

to match that of the physical spans a – f run to the site:

span_config <option#1> <option#2> <option#3> <option#4> <option#5>

option#1 = the span to change (a – f)

option#2 = the span type (0 – 8):

0 – E1_1 (HDB3, CCS, CRC–4)

1 – E1_2 (HDB3, CCS)

2 – E1_3 (HDB3, CAS, CRC–4, TS16)

3 – E1_4 (HDB3, CAS, TS16)

4 – T1_1 (AMI, DS1 AT&T D4, without ZCS, 3 to 1 packing, Group 0 unusable)

5 – T1_2 (B8ZS, DS1 AT&T ESF, 4 to 1 packing, 64K link)

6 – J1_1 (B8ZS, J1 AT&T ESF, Japan CRC6, 4 to 1 packing)

7 – J1_2 (B8ZS, J1 AT&T ESF, US CRC6, 4 to 1 packing)

8 – T1_3 (AMI, DS1 AT&T D4, with ZCS, 3 to 1 packing, Group 0 unusable)

option#3 = the link speed (56 or 64) Kbps

option#4 = the span equalization (0 – 7):

0 – T1_6 (T1,J1:long haul)

1 – T1_4 (T1,J1:393–524 feet)

2 – T1_4 (T1,J1:131–262 feet)

3 – E1_75 (E1:75 Ohm)

4 – T1_4 (T1,J1:0–131 feet)

5 – T1_4 (T1,J1:524–655 feet)

6 – T1_4 (T1,J1:262–393 feet)

7 – E1_120 (E1:120 Ohm)

option#5 = the slot that has LAPD channel (0 – 31)

Example for setting span configuration to E1_2, 64 Kbps, E1_120–Ohm, LAPD channel 1:

span_config a 1 64 7 1

span_config f 1 64 7 1

Example for setting span configuration to T1_2, 64 Kbps, T1_4 (0–131 feet), LAPD channel 0:

span_config a 5 64 4 0

span_config f 5 64 4 0

NOTE

Make sure that spans a – f are set to the same span type and link speed. The equalization may be

different for each individual span.

After executing the span_config command, the affected MGLI2/GLI2 board MUST be reset and

re–loaded for changes to take effect.

Although defaults are shown, always consult site specific documentation for span type and rate used at

the site.

4 Press the RESET button on the GLI2 for changes to take effect.

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