Instruction Manual

Prepare to Leave the Site – continued
Apr 2001
5-5
SC4812ET BTS Optimization/ATP — CDMA LMF
DRAFT
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
* IMPORTANT
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/SGLI2 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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