3Com MSR 30, MSR 50 manual Tdm-clock, Related command timeslot-setand pri-set

2670 CHAPTER 175: E1 AND T1 CONFIGURATION COMMANDS

23: Indicates the subscriber line is created for the ISDN PRI set created on a T1 interface.

Description Use the subscriber line command to enter E1/T1 voice subscriber line view.

Upon creation of a TS group on an E1/T1 interface, the system automatically creates a logical voice subscriber line numbered in the form of E1/T1 interface number:TS group number. On the voice subscriber line, you can conveniently configure signaling and other voice functions for the corresponding E1/T1 line. Note that on each E1/T1 interface you can create only one TS group.

After you create a PRI set with the pri-setcommand on an E1/T1 interface, a voice subscriber line is automatically created. This line is numbered E1 interface-number:15on an E1 interface and T1 interface-number:23on a T1 interface.

Related command: timeslot-setand pri-set.

Example # Enter the view of voice subscriber line 1/0:15.

<Sysname> system-view

[Sysname] voice-setup

[Sysname-voice] subscriber-line 1/0:15

[Sysname-voice-line1/0:15]

tdm-clock

Syntax tdm-clock { internal line [ primary ] }

undo tdm-clock

View E1/T1 interface view

Parameter internal: Sets the time division multiplexing (TDM) clock source on the E1/T1 interface to internal crystal oscillator TDM clock. The E1/T1 interface thus obtains clock from the crystal oscillator on the mainboard. If it fails to do that, the interface obtains clock from the crystal oscillator on its E1/T1 card. As SIC cards are not available with crystal oscillator clocks, E1/T1 interfaces on SIC cards can only obtain clock from the mainboard. The internal clock source is also referred to as master clock mode in some features.

line: Sets the TDM clock source on the E1/T1 interface to line TDM clock. The E1/T1 interface thus obtains clock from the remote device through the line. The line clock source is also referred to as slave clock mode in some features.

line primary: Sets the TDM clock source on the E1/T1 interface to line TDM clock with priority. The E1/T1 interface thus always attempts to use the line TDM clock prior to any other clock sources.

Description Use the tdm-clockcommand to set the TDM clock source for an E1/T1 interface.