Loop interface and call supervision parameters – Nortel Networks BCM50 User Manual
Page 265
Appendix N Market profile attributes
265
Installation and Maintenance Guide
Mexico
No (North American
based A-law)
North
America
600
Ω
600
Ω
A-law
New Zealand
No (UK-based telephony
with Australian tones)
UK
370
Ω
+ (620
Ω
|| 310 nF)
300
Ω
+
(1000
Ω
||
220 nF)
A-law
North America
Yes
North
America
600
Ω
600
Ω
mu-law
Poland
Yes
Poland
600
Ω
600
Ω
A-law
United
Kingdom
Yes
UK
370
Ω
+
(620
Ω
||
310 nF)
300
Ω
+
(1000
Ω
||
220 nF)
A-law
Table 71 Loop interface and call supervision parameters
Market profile
Loop interface
Call supervision
Ringing
frequency
(Hz)
Ringing
amplitude
(Vrms)
Loop
Current
Detect
Threshold
(mA)
Loop
current
limit
(mA)
Min.
seize
duration
(ms)
Min
answer
duration
(ms)
Min/max
recall
duration
(ms)
Min
clear
duration
(ms)
Australia
25 65
18
32
200
50
30/150
1500
Bahrain
20
65
18
32
150
25
250/1100 1400
Canada
20 65 18
32
150
25
250/1100
1400
Caribbean
20 65
18
32
150
25
250/1100
1400
Global
20
65 18
32
150
25
250/1100
1400
Hong Kong
20
65
18
32
150
25
250/1100
1400
Ireland
25 65
18
32
200
50
15/150
1500
Mexico
20
65
18
32
150
25
250/1100 1400
New Zealand
25
65
18
32
200
50
15/150
1500
North America
20
65
18
32
150
25
250/1100
1400
Poland
25
65
18
32
180
80
75/520
680
United Kingdom
25
65
18
32
200
50
15/150
1500
Table 70 Localization, DIP switch settings, specifications, and transmission parameters (Sheet 2 of 2)
Market
profile
Localized
DIP
switch
setting
Transmission
Terminal
Input
impedance
Nominal
Network
Input
Impedance
PCM
coding
scheme