3Com T1/PRI manual Menu Option 1 Configuring the span line’s framing mode

2-2CHAPTER 2: DUAL T1/PRI CONFIGURATION

The UI console menu options for configuring both spans are identical. Selecting options 5 or 6 from the main menu produces this screen for that span:

Span Line 1 Configuration		Current Setting
1	Framing Mode	ESF
2	Line Coding	B8ZS
3	Remote Loopback		Ignore
4	Jitter Attenuation	Transmitter
5	Transmit Line Build Out	0.0 fN
6	Switch Type (Boot time)		Config=5ESS(AT&T)Act.=5ESS (AT&T)
7	Idle Byte Sent to TELCO		FE Hex
8	DSO to Modem Slot/Chan Mapping
9	Signaling Channel Config (Boot time) Config=D-channel Act.=D-channel
10	Interface ID	0
11	Span Level Call Type Blocking		No Call Blocked
12	Span Level Cause Codes
13	DS0 Level Call Type Blocking
14	DS0 Level Service State
15	Short Haul NIC Line Length		Not Applicable
16	Use ALERTING Response		NO

(NOTE: Changing configuration parameters may affect calls in progress.)

Enter menu selection and press Return or press Esc to exit.

Menu Selection (1-16):

Menu Option 1 Configuring the span line’s framing mode

The framing mode selects the T1 format.

Menu Option 2 Configuring the span line’s line coding

Line coding dictates how the data stream is encoded on the span line.

Menu Option 3 Responding to a span line remote (framer) loopback

Performing a framer loopback is one method of performing enhanced trouble clearing. The NAC is put in a “waiting” state for the Telco’s loopback (loop-up/loop-down) signal if configured to respond. Various network nodes can be put into loopback in order to isolate “trouble spots” in the network.