Nortel Passport 15000 Preparation Manual page 81

transmit and receive DS1 signals over an electrical DS3 interface. It also has
an Ethernet port, which could be used to link to Preside Multiservice Data
Manager.
Since the hardware of an EdgeLink is manufactured by Telco Systems, it is
subject to change without notice. Confirm the installation criteria in Telco
Systems documentation, starting with EdgeLink 100 Digital Multiplexer
General Description, section 825-102-001.
An EdgeLink 100 is powered by -48 V dc, but it does not need to share the
same power-and-ground sources as the Passport 15000 or 20000.
The mounting of an EdgeLink 100 in a NEBS 2000 frame, grounding it, and
connecting power to it is described in 241-1501-240 Passport 15000, 20000
Hardware Installation, Maintenance and Upgrade, the chapter on installing
interface equipment.
External alarm connections between the EdgeLink and the Passport 15000 or
20000 are not supported.
The line impedance of the interface cables is 75 ohms unbalanced for DS3
and 100 ohms nominal balanced for DS1.
The lengths of the prefabricated interface cables are in the table "Cable
lengths between an EdgeLink 100 and a Passport 15000 or 20000" (page 81).
For other lengths, contact your local Nortel Networks sales representative.
Table 18
Cable lengths between an EdgeLink 100 and a Passport 15000 or 20000
Type Part numbers
DS1 Telco Systems'
AWX436G or AWX438G
DS3 custom-made coax cable
Ethernet Telco Systems'
AWX454G10
Passport 15000, 20000 Site Requirements and Preparation Guide
Chapter 2 Planning considerations 81
Maximum length
131 m (432 ft) up to an FP
137 m (450 ft) up to an FP
3 m (10 ft) up to an Ethernet hub
linked to Preside Multiservice Data
Manager
5.2S2