16
One STM-4 support Maximum 268 E1's.
There are 63 E1 in one STM 1
E1 support bit rate of 2.048 Mbps and contains 30 no of DSOs.
In sdh radio 63 E1's are there
There are 63 e1's in sdh STM-1 = 63 x E1; STM-4 = 63 x 4 E1; STM-16 = 63 x 16 E1; STM-64 = 63 x 64 E1.
E1 uses 32 data channels. Each E1 frame consists of 32 time slots, where 30 slots are allocated for user data, one slot is used for synchronization, and one slot is reserved for signaling. This configuration allows E1 to transmit voice and data simultaneously over the same link.
e1
The Data rate of one E1 is 2048 bps which have 32 voice channels.And STM is a multiplexing of E1's in SONET we say STM-4 is equal to OC-12 both have same data rates i.e. 622.08 Mbps it support 269 E1's. STM-1 or OC-3 supports 67 E1's data rate (155.52 Mbps).
STM-0= 21 E1 lines STM-1=(64x1) - 1 = 63 E1 lines STM-4=(64x4) - 4 = 252 E1 lines STM-16=(64x16) - 16 = 1008 E1 lines STM-64=(64x64) - 64 = 4032 E1 lines and so on
2 mb
well E1 is added to many fooods and the thing is is that if you dont eat it you will doe a painfull death!
There is no direct mapping of E1 to DS3. The only way to connect the two is using an MPLS network. A DS3 is 45Mbps. An E1 is 2Mbps. The bandwidth of 22.5 E1's can traverse a DS3. In order to directly connect an E1 as would a T1 to a DS3 you would need an E3 An E3 is 34 Mbps and 16 E1's could connect to it.