3Com NETBuilder SI, SuperStack II manual Set the baud rate 56 or 64 kbps for the DS0 channel using

Configuring Serial Ports with DCEs 75

LH4 = 22.5 db	SH4 = 399 - 533 feet
	SH5 = 533 - 655 feet

3Set the baud rate (56 or 64 kbps) for the DS0 channel using:

SETDefault !<path> -PATH T1DSoChnlBaud = <FT156KFT164K>

4Set the path clock using:

SETDefault !<path> clock = [Internal External]

5Re-enable the path using:

SETDefault !<path> -PATH CONTrol = Enabled

The following optional settings are also available:

■T1FrameMode

■Superfame (SF)

■Extended Superframe (ESF)

■T1LineCoding

■Binary with 8 zero substitution (B8ZS)

■Alternate Mark Inversion (AMI)

■Alternate Mark Inversion with bit 7 zero code substitution (AMIB7ZCS)

Configuring Serial This section describes how to configure the serial ports with modems,

Ports with DCEs CSU/DSUs, or ISDN TAs attached.

Before beginning this procedure, complete the following tasks:

■Cable the serial port and connect it to the telephone network.

■Log on to the system with Network Manager privilege.

The serial port automatically detects the following settings:

■Line type — dial-up or leased

■Clock — external

■Connector type — RS-232, V.35, X.21, RS-449, or RS-530

ISDN TAs If you are attaching an ISDN TA, you must configure the TA with the SPIDs, switch type, local telephone numbers, and Multilink PPP options