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Users Manual Part 1

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Figure 76: E1/X.21 and Ethernet Site Link Connectors on the MTS 2 Junction Panel
X.21
E1 Ethernet Site Link
Figure 77: E1/X.21 and Ethernet Site Link Connectors on the MTS 4 Junction Panel
X.21
E1
Ethernet Site Links
NOTICE:
The network termination unit (NTU) in the same building shall provide the necessary isolation
between the X.21/E1 interface and the network, and should be approved for use by the
appropriate agency in the end user country.
Do not remove the supplied caplug and retaining bag from the D-type connector of the X.21 or
E1 cable.
A surge arrestor should be used. For full instructions and guidelines, please refer always to
Motorola Standards and Guidelines for Communications Sites, R56.
Table 23: Site Link Connector E1 on Junction Panel on page 147 and Table 24: Site Link Connector
X.21 on Junction Panel on page 147 show the pin assignment for E1 and X.21 connection.
The E1 connector described in Table 23: Site Link Connector E1 on Junction Panel
on page 147
contains two E1 lines. If only one line is needed, use Receive 1 and Transmit 1. Be aware that the Pin
definitions on the Site Controller are different from the E1 connector on the Junction Panel.
6802800U74-AP
Chapter 4: Hardware Installation
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