Preliminary Information
Table 1: Impedance Matching with Jumpers
Zin Code
1
2
3
4
5
6
7
600
UK
D
NA
F
N
A
Zin 2-Wire Input Impedance
600Ω
370Ω + 620Ω // 310nF
220Ω + 820Ω // 310nF
350Ω + 1000Ω // 310nF
210Ω +880Ω // 310nF
120Ω + 820Ω // 310nF
220Ω + 820Ω // 310nF
Administration
---
United Kingdom
Germany, Austria
Canada, USA
France
Norway
Australia
ZN1 Link to:
ZN7
ZN6
ZN5
ZN4
ZN3
ZN2
Use D Code
MH88600
ZN8 Link to:
---
ZN13
ZN12
ZN11
ZN10
ZN9
Use D Code
Note 1: The above impedances are as suggested by references: BS6305 (UK), REG3 (Australia), Proposed NET4, FCC Part 68 and
recommendations by the various Administrations. Confirm your impedance requirements before proceeding.
Note 2: All links to ZN1 should be as short as possible.
Table 2: Impedance Matching with External Components
Zin Code
1
2
3
4
---
ATT
NTT
NZ
Zin 2-Wire Input Impedance
600Ω
+ 2.16µF
900Ω + 2.16µF
600Ω + 1.0µF
370Ω + (620Ω // 220nF)
Administration
---
AT&T
NTT
New Zealand
Rs
6kΩ
9kΩ
6kΩ
3.7kΩ
Rp
1MΩ
1MΩ
1MΩ
6.2kΩ
Cp
216nF
216nF
100nF
22nF
Note 1: The above impedances are as suggested by reference CCITT Q.522. Confirm your impedance requirements before proceeding.
Note 2: For Rs, Rp & C calculations, G is set to 10, R is set to 5656.8
Ω,
refer to figure 8 for additional information.
Table 3: Transmit and Receive Gain Programming
Transmit Gain
(dB)
+5.62
+4.0
+3.69
+2.1
0.0
-3.0
Transmit Gain
(dB)
+6.6
+0.0
-3.0
-3.69
4.0
-6.5
RTX Resistor
Value (Ω)
270k
No Resistor
216k
180k
141k
100k
RTX Resistor
Value (Ω)
33.1k
70.7k
100k
108k
No Resistor
150k
Results in 0dB overall gain when used with Mitel A-law codec (ie. MT8964)
Results in 0dB overall gain when used with Mitel
µ-law
codec (ie MT8965)
Results in 0dB overall gain when used with Mitel A-law codec (ie MT8965)
Results in 0dB overall gain when used with Mitel
µ-law
codec (ie MT8964)
Notes
Notes
Note 1: See Figures 4 and 5 for additional details.
Note 2: Overall gain refers to the receive path of PCM to 2-Wire, and to transmit path of 2-Wire to PCM.
2-91
MITEL [ MITEL NETWORKS CORPORATION ]
