DIP Switches on the boards

DMCM

The DIP switches on the DMCM specify the grounding of eight E1 routes.Table 1lists their detailed settings.

**Table 1** Description of the DIP switches on the DMCM
DIP Switch	DIP Bit	ON/OFF	Function
E1-R0/1	1	ON	The ring of the transmitting end of E1 0 is grounded.
	1	OFF	The ring of the transmitting end of E1 0 is not grounded.
	2	ON	The ring of the receiving end of E1 0 is grounded.
	2	OFF	The ring of the receiving end of E1 0 is not grounded.
	3	ON	The ring of the transmitting end of E1 1 is grounded.
	3	OFF	The ring of the transmitting end of E1 1 is not grounded.
	4	ON	The ring of the receiving end of E1 1 is grounded.
	4	OFF	The ring of the receiving end of E1 1 is not grounded.
E1-R2/3	1	ON	The ring of the transmitting end of E1 2 is grounded.
	1	OFF	The ring of the transmitting end of E1 2 is not grounded.
	2	ON	The ring of the receiving end of E1 2 is grounded.
	2	OFF	The ring of the receiving end of E1 2 is not grounded.
	3	ON	For the DMCM (With SDH Module) and the DMCM (Without SDH Module), the ring of the third TX E1 route is grounded. For the DMCM (Abis Bypass), the status of OML1 is ON.
	3	OFF	For the DMCM (With SDH Module) and the DMCM (Without SDH Module), the ring of the third TX E1 route is not grounded. For the DMCM (Abis Bypass), the status of OML1 is OFF.
	4	ON	For the DMCM (With SDH Module) and the DMCM (Without SDH Module), the ring of the third RX E1 route is grounded. For the DMCM (Abis Bypass), the status of OML2 is ON.
	4	OFF	For the DMCM (With SDH Module) and the DMCM (Without SDH Module), the ring of the third RX E1 route is not grounded. For the DMCM (Abis Bypass), the status of OML2 is OFF.
75/120	1	ON	E1 0 matches 75-ohm resistance.
	1	OFF	E1 0 matches 120-ohm resistance.
	2	ON	E1 1 matches 75-ohm resistance.
	2	OFF	E1 1 matches 120-ohm resistance.
	3	ON	E1 2 matches 75-ohm resistance.
	3	OFF	E1 2 matches 120-ohm resistance.
	4	ON	For the DMCM (With SDH Module) and the DMCM (Without SDH Module), indicates E1_3 matches 75-ohm resistance. For the DMCM (Abis Bypass), the status of OML3 is ON.
	4	OFF	For the DMCM (With SDH Module) and the DMCM (Without SDH Module), indicates E1_3 matches 120-ohm resistance. For the DMCM (Abis Bypass), the status of OML3 is OFF.
MODE	1	ON	For the DMCM (With SDH Module) and the DMCM (Without SDH Module), the transmission mode is E1 transmission. For the DMCM (Abis Bypass), the bypass function in case of poweroff is enabled.
	1	OFF	For the DMCM (With SDH Module), the transmission mode is optical transmission. For the DMCM (Without SDH Module), the DIP switch cannot be set to this status. For the DMCM (Abis Bypass), the bypass function in case of poweroff is disabled.
	2	ON	For the DMCM (With SDH Module) and the DMCM (Without SDH Module), the DIP switch is reserved. For the DMCM (Abis Bypass), the bypass function in case of poweroff is enabled.
	2	OFF	For the DMCM (With SDH Module) and the DMCM (Without SDH Module), the DIP switch is reserved. For the DMCM (Abis Bypass), the bypass function in case of poweroff is disabled.
	3	ON	Formal software status
	3	OFF	Aging software status
	4	ON	For the DMCM (With SDH Module) and the DMCM (Without SDH Module), the DIP switch is reserved. For the DMCM (Abis Bypass), the bypass function in case of poweroff is enabled.
	4	OFF	For the DMCM (With SDH Module) and the DMCM (Without SDH Module), the DIP switch is reserved. For the DMCM (Abis Bypass), the bypass function in case of poweroff is disabled.

CAUTION:

If you need to configure the DMCM (Abis Bypass) as bypass function enabled or bypass function disabled, Bits 1, 2, 4 of the MODE switch must be set to the same status.

Table 2 describes the OML DIP switches on the DMCM.

**Table 2** Description of the OML DIP switches on the DMCM
Settings of the OML DIP Switch			E1 Timeslot
OML1 (E1-R2/3.3)	OML2 (E1-R2/3.4)	OML3 (75/120.4)	E1 Timeslot
ON	ON	ON	31
OFF	ON	ON	30
ON	OFF	ON	29
OFF	OFF	ON	28
ON	ON	OFF	27
OFF	ON	OFF	3
ON	OFF	OFF	6
OFF	OFF	OFF	9

Table 3 describes the RACK DIP switches on the DMCM.

**Table 3** Description of the RACK DIP Switches on the DMCM
Bits on the RACK DIP Switch				Function
4	3	2	1	Function
ON	ON	ON	ON	Rack 0 indicates the main cabinet in the main cabinet group.
ON	ON	ON	OFF	Rack 1 indicates the extension cabinet in the main cabinet group.
ON	ON	OFF	ON	Rack 2 indicates the extension cabinet in the main cabinet group.
ON	ON	OFF	OFF	Rack 3 indicates the main cabinet in the extension cabinet group.
ON	OFF	ON	ON	Rack 4 indicates the extension cabinet in the extension cabinet group.
ON	OFF	ON	OFF	Rack 5 indicates the extension cabinet in the extension cabinet group.

NOTE:

Bit 4 on the RACK DIP switch is reserved temporarily. Bit 4 is ON by default.

DTMU

The DIP switches on the DTMU specify the grounding of eight E1 routes.Table 4lists their detailed settings.

**Table 4** Settings of the DIP switches on the DTMU
DIP Switch	DIP Bit	ON/OFF	Description
S5	1	ON	Ring of the first TX E1 route is grounded.
	1	OFF	Ring of the first TX E1 route is not grounded.
	2	ON	Ring of the first RX E1 route is grounded.
	2	OFF	Ring of the first RX E1 route is not grounded.
	3	ON	Ring of the second TX E1 route is grounded.
	3	OFF	Ring of the second TX E1 route is not grounded.
	4	ON	Ring of the second RX E1 route is grounded.
	4	OFF	Ring of the second RX E1 route is not grounded.
S4	1	ON	Ring of the third TX E1 route is grounded.
	1	OFF	Ring of the third TX E1 route is not grounded.
	2	ON	Ring of the third RX E1 route is grounded.
	2	OFF	Ring of the third RX E1 route is not grounded.
	3	ON	Ring of the fourth TX E1 route is grounded.
	3	OFF	Ring of the fourth TX E1 route is not grounded.
	4	ON	Ring of the fourth RX E1 route is grounded.
	4	OFF	Ring of the fourth RX E1 route is not grounded.
S7	1	ON	Ring of the fifth TX E1 route is grounded.
	1	OFF	Ring of the fifth TX E1 route is not grounded.
	2	ON	Ring of the fifth RX E1 route is grounded.
	2	OFF	Ring of the fifth RX E1 route is not grounded.
	3	ON	Ring of the sixth TX E1 route is grounded.
	3	OFF	Ring of the sixth TX E1 route is not grounded.
	4	ON	Ring of the sixth RX E1 route is grounded.
	4	OFF	Ring of the sixth RX E1 route is not grounded.
S6	1	ON	Ring of the seventh TX E1 route is grounded.
	1	OFF	Ring of the seventh TX E1 route is not grounded.
	2	ON	Ring of the seventh RX E1 route is grounded.
	2	OFF	Ring of the seventh RX E1 route is not grounded.
	3	ON	Ring of the eighth TX E1 route is grounded.
	3	OFF	Ring of the eighth TX E1 route is not grounded.
	4	ON	Ring of the eighth RX E1 route is grounded.
	4	OFF	Ring of the eighth RX E1 route is not grounded.

NOTE:

Adhere to the following principles to set the DIP switches on the DTMU:

Set all the DIP switches to ON when the 75-ohm E1 cable is used for the BTS.
Set all the DIP switches to OFF when the 120-ohm E1 cable is used for the BTS.

GTMU&UELP

The GTMU has five DIP switches. Each DIP switch has four DIP bits. The DIP switches S1 and S2 should be set in pairs,the functions of the DIP switches are as follows:

S1 is used to set E1 impedance. Table 5 describes the settings of the DIP switch.
S2 is used to set the grounding of E1/T1 transmission. Table 6 describes the settings of the DIP switch.
S3 is reserved.
S4 is used for the selection of E1 bypass. Table 7 describes the settings of the DIP switch.
S5 is used to set the timeslots when the E1 link is bypassed. Table 8 describes the settings of the DIP switch.

**Table 5** Settings of S1
DIP Switch	DIP Status		Description
DIP Switch	1	2	Description
S1	ON	ON	The E1 impedance is set to 75 ohms.
	OFF	ON	The E1 impedance is set to 120 ohms.
	ON	OFF	The T1 impedance is set to 100 ohms.

NOTE:

The DIP bits 3 and 4 of S1 should retain the default settings. The default settings are OFF. If they are ON, you should change them to OFF.

**Table 6** Settings of S2
DIP Switch	DIP Status				Description
DIP Switch	1	2	3	4	Description
S2	OFF	OFF	OFF	OFF	All the DIP bits of S2 are set to OFF (balanced mode) by default in all modes.
	ON	ON	ON	ON	When four 75-ohm E1 links are faulty, all the DIP bits of S2 should be set to ON (unbalanced mode) so that the faults are rectified.
	Other settings of the DIP bits				Disabled

**Table 7** Settings of S4
DIP Switch	DIP Status				Description
DIP Switch	1	2	3	4	Description
S4	ON	ON	ON	ON	The E1 link can be bypassed.
	OFF	OFF	OFF	OFF	The E1 link cannot be bypassed.
	Other settings of the DIP bits				Disabled

**Table 8** Settings of S5
DIP Switch	DIP Status				Description
DIP Switch	1	2	3	4	Description
S5	ON	ON	ON	ON	The E1 link cannot be bypassed.
	OFF	ON	ON	OFF	The E1 link of the Level 1 cascaded BTS can be bypassed.
	ON	OFF	ON	OFF	The E1 link of the Level 2 cascaded BTS can be bypassed.
	OFF	OFF	ON	OFF	The E1 link of the Level 3 cascaded BTS can be bypassed.
	ON	ON	OFF	OFF	The E1 link of the Level 4 cascaded BTS can be bypassed.
	OFF	ON	OFF	OFF	The E1 link of the Level 5 cascaded BTS can be bypassed.

NOTE:

The E1 bypass function is not supported at this version. All the DIP bits of S4 should be set to OFF, and all the DIP bits of S5 should be set to ON.

Table 9describes the DIP switch on the UELP.

**Table 9** DIP switch on the UELP
DIP Switch	DIP Status				Description
DIP Switch	1	2	3	4	Description
S1	ON	ON	ON	ON	Used for the 75-ohm unbalanced mode
S1	OFF	OFF	OFF	OFF	Used for other modes except the 75-ohm unbalanced mode