Configuring Digital Line Cards (T1, E1, And Bri Cards ) - 3Com NBX 100 Installation Manual

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ONFIGURING
C (T1, E1,
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This chapter describes how to add and configure either a T1, E1, or BRI
Digital Line Card to handle a T1 or E1 line (with one span each) or a BRI
line (4 BRI spans for each BRI card added).
The NBX ® 100 can accommodate up to three T1/E1 cards or nine BRI
cards. An additional restriction applies to the number of cards in any one
chassis:
three T1 or E1 cards, in any combination, provided that you connect
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them using MDI-X ports.
one T1 or E1 card, if you connect the card using the NBX 100
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backplane.
three BRI cards (regardless of the connection method)
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Some people refer to a T1 or E1 Digital Line Card using the category
name TEP (T1, E1, ISDN PRI) to include both. The NBX 100 can
accommodate:
T1 cards using E&M robbed-bit signaling (sometimes referred to as
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"Standard T1").
T1 cards using ISDN PRI (Primary Rate Interface) signaling.
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E1 cards using ISDN PRI signaling.
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By default, the NBX 100 auto-discovers a T1 card as T1 E&M, and an E1
card as ISDN PRI.
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