Transmission parameters – Nortel Networks BCM50 User Manual
Page 261
Appendix N Market profile attributes
261
Installation and Maintenance Guide
Bahrain
Yes
Legacy GATM4/8 NOT supported
(will not function)
25
17
700
Brazil
Yes
DTMF CLID NOT supported on
GATI or Legacy GATM4/8
66
34
800
CALA
No
(North
American
based
A-law)
None
60
40
700
Canada
Yes
None
60
40
700
Caribbean
Yes
None
60
40
700
Global
No (North
American
based
A-Law)
None
60
40
700
Hong Kong
Yes
Line Reversal NOT supported on
Legacy GATM4/8
66
33
600
Ireland
Yes
Legacy GATM4/8 NOT supported
(will not function)
66
34
1000
Mexico
Yes
None
60
40
700
New Zealand
No
(UK-based
telephony
with
Australian
tones)
None
66
34
740
North America
Yes
None
60
40
700
Poland
Yes
None
66
33
700
PRC
Yes
DTMF CLID NOT supported on
GATI or Legacy GATM4/8
34
66
700
Taiwan
Yes
None
66
33
800
United Kingdom
Yes
None
66
34
740
Table 67 Transmission parameters (Sheet 1 of 2)
Market profile
Transmission
PCM coding
scheme
AC impedance
Loop length
adjustment
capability
Tx CO gain
(short, medium,
long)
Rx CO gain
(short, medium,
long)
Australia
A-law
220
Ω
+ (820
Ω
||
120 nF)
No
(N/A, 0, N/A)
(N/A, 6 dB, N/A)
Bahrain
A-law
900
Ω
+ 2.16 uF
Yes
(0, 3 dB, 3 dB)
(3, 3 dB, 6 dB)
Brazil
A-law
600
Ω
/900
Ω
Yes
(-3 dB, 0, 0)
(0, 0, 3 dB)
CALA
A-law
600
Ω
Yes
(-3 dB, 0, 0)
(0, 0, 3 dB)
Canada
mu-law
600
Ω
Yes
(-3 dB, 0, 0)
(0, 0, 3 dB)
Caribbean
mu-law
600
Ω
Yes
(-3 dB, 0, 0)
(0, 0, 3 dB)
Table 66 Localization, PSTN standards, and pulse dialing parameters (Sheet 2 of 2)
Market profile
Localized
Differences between GATI,
G4x16/G8x16, New GATM4/8,
and Legacy GATM4/8
Pulse Dialing (ms)
Break
time
Make
time
Interdigit
time