Technical Documentation

Dual CT1/E1 GPIM Network Interface Specifications

The Dual CT1/E1 Gigabit-Backplane Physical Interface Module (GPIM) provides the network interface specifications specific to T1 or E1 modes, listed in Table 1.

Table 1: Dual CT1/E1 GPIM Network Interface Specifications

Description	T1 Mode	E1 Mode
Network Interface Specifications
Line encoding	AMI/B8ZS	HDB3
Mode	Framed clear channel	Framed clear channel (64 Kbps) Unframed clear channel
Fractional framing	Superframe (D4/SF) Extended Superframe (ESF)	G704 G704 with no CRC4 G703 Unframed
HDLC Features
N x 64 Kbps or N x 56 Kbps, nonchannelized data rates	(T1:N=1 to 24)	(E1:N=1 to 31)
CRC	16/32	16/32
Shared flag	Supported	Supported
Idle flag/fill	Supported	Supported
Counters:	Runts, Giants, FCS, Error, Abort Error, Align Error	Runts, Giants, FCS, Error, Abort Error, Align Error

Related Topics

Published: 2010-07-13

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