Nortel Networks 553-3001-211 manual Environmental specifications

Page 642 of 894 NT8D15 E&M Trunk card

Environmental specifications

Table 200 provides the environmental specifications for the E&M trunk card.

Table 200

Environmental specifications

Parameter	Specifications
Operating temperature	0 to +60 degrees C
	(32 to +140 degrees F), ambient
Operating humidity	5 to 95% RH (non-condensing)
Storage temperature	–40 to +70 degrees C
	(–40 to +158 degrees F)

Foreign and surge voltage protection

The E&M trunk card meets CS03 over-voltage (power cross) specifications and FCC Part 68 requirements.

Connector pin assignments

The E&M trunk card brings the four analog trunks to the backplane through a 160-pin connector shroud.The backplane is cabled to the I/O panel on the rear of the module, which is then connected to the Main Distribution Frame (MDF) by 25-pair cables.

Telephone trunks connect to the E&M trunk card at the MDF using a wiring plan similar to that used for line cards.

A typical connection example is shown in Figure 150 on page 645. A list of the connections to the E&M trunk card in the various 2-wire modes is shown in Table 201. A list of the connections to the E&M trunk card in the various 4-wire modes is shown in Table 202 on page 643.

553-3001-211 Standard 2.00 September 2004