Avaya Nortel Communication Server 1000 Reference page 100

Option settings
Trunk types
2-way tie (LDR)
2-way tie (OAID) 600 or 900 ohms
DID (loop < 600
ohms)
DID (loop Š 600
ohms)
RAN:
continuous
operation mode
Paging
Note:
The terminating impedance of each trunk unit is software selectable in LD 14 and should
match the nominal impedance of the connecting equipment.
Note:
The balance network of each trunk unit is software selectable between resistive 600 or
900 ohms or 3COM and is jumper selectable between 3COM1 and 3COM2.
Table 33: NT8D14 vintages BA/BB cable loop resistance and loss
Cable length
915 m (3000 ft)
1524 m (5000 ft) 162
2225 m (7300 ft) 236
3566 m (11700
ft)
5639 m (18500
ft)
100 Circuit Card Reference
Terminating Balance network for loop lengths (Note 2)
impedance
Zero–915 m
(Note 1)
(zero–3000 ft)
600 or 900 ohms 600 ohms
600 ohms
600 or 900 ohms 600 ohms
600 or 900 ohms 600 ohms
600 or 900 ohms 600 or 900 ohms
600 ohms 600 ohms
Cable loop resistance (ohms)
22 AWG 24 AWG
97 155
260
378
379 607
600 960
Comments? infodev@avaya.com
915–1524 m
(3000–5000 ft)
3COM1
3COM1
3COM1
N/A
N/A
N/A
Cable loop loss (dB) (non-loaded
26 AWG 22 AWG
251 0.9
417 1.6
609 2.3
977 3.7
1544 5.9
> 1524 m (>
5000 ft)
3COM2
3COM2
3COM2
3COM2
N/A
N/A
at 1kHz)
24 AWG 26 AWG
1.2 1.5
2.0 2.5
3.0 3.7
4.8 6.0
7.6 9.4
July 2011